Patent Publication Number: US-11648778-B2

Title: Liquid ejecting head and liquid ejecting apparatus

Description:
The present application is based on, and claims priority from JP Application Serial Number 2020-131017, filed Jul. 31, 2020, the disclosure of which is hereby incorporated by reference herein in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a liquid ejecting head and a liquid ejecting apparatus for ejecting a liquid from a nozzle, particularly to an ink jet type recording head and an ink jet type recording apparatus for ejecting ink as a liquid. 
     2. Related Art 
     A liquid ejecting apparatus represented by an ink jet type recording apparatus, such as an ink jet type printer or plotter, includes a liquid ejecting head that is capable of ejecting a liquid, such as ink stored in a cartridge, a tank or the like, as liquid droplets. 
     In such a liquid ejecting head, it is difficult to elongate the nozzle (increase the number of nozzles) or to increase the density by itself, because the liquid ejecting head becomes large, the yield deteriorates, and the manufacturing cost becomes expensive. Therefore, a liquid ejecting head in which a nozzle is elongated by fixing a plurality of head chips for ejecting liquid to a common flow path member, was proposed. 
     In the liquid ejecting head, the head chips are disposed to be offset from each other in an extending direction of a nozzle row, and a filter chamber is provided corresponding to each head chip (for example, refer to JP-A-2020-49874). 
     However, since there is a difference in the flow path length from the position of the introduction port where the liquid is supplied to each filter chamber, there is a problem that variation in the pressure loss occurs between the nozzle rows of the same series of head chips, the variation in the discharge characteristics of the liquid droplets occurs, and there is a concern that the print quality deteriorates. 
     Such a problem is not limited to the ink jet type recording head, and also exists in a liquid ejecting head that ejects the liquid other than ink. 
     SUMMARY 
     According to an aspect of the present disclosure, there is provided a liquid ejecting head including: a first nozzle row extending in a first direction; a second nozzle row extending in the first direction; a first supply flow path for supplying a liquid to the first nozzle row and the second nozzle row; a first filter chamber, which has a first inlet through which the liquid flows in from the first supply flow path, and in which the liquid to be supplied from the first supply flow path to the first nozzle row flows; and a second filter chamber, which has a second inlet through which the liquid flows in from the first supply flow path, and in which the liquid to be supplied from the first supply flow path to the second nozzle row flows, in which the first nozzle row and the second nozzle row are disposed to be offset from each other in both the first direction and a second direction orthogonal to the first direction, the first nozzle row ejects the liquid in a third direction orthogonal to the first direction and the second direction, the first supply flow path has a branch flow path for distributing the liquid between the first filter chamber and the second filter chamber at a branch position, the branch position is disposed between the first filter chamber and the second filter chamber in a plan view when viewed in the third direction, the first filter chamber and the second filter chamber are disposed so as to at least partially overlap each other when viewed in the second direction, and the first inlet and the second inlet are disposed at a part where the first filter chamber and the second filter chamber overlap each other when viewed in the second direction. 
     According to another aspect of the present disclosure, there is provided a liquid ejecting apparatus including: the liquid ejecting head according to the above-described aspect; and a transport section that transports a medium. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a view schematically illustrating a schematic configuration of a recording apparatus. 
         FIG.  2    is an exploded perspective view of a head module. 
         FIG.  3    is a plan view of the head module. 
         FIG.  4    is a perspective view of a recording head when viewed in a +Z direction. 
         FIG.  5    is an exploded perspective view of the recording head when viewed in the +Z direction. 
         FIG.  6    is an exploded perspective view of the recording head when viewed in a −Z direction. 
         FIG.  7    is a plan view when viewed in the +Z direction for describing a shape of the recording head. 
         FIG.  8    is a plan view of the recording head when viewed in the −Z direction. 
         FIG.  9    is a sectional view of a head chip. 
         FIG.  10    is a view schematically illustrating a flow path of the head chip. 
         FIG.  11    is a schematic view describing a flow path. 
         FIG.  12    is a perspective view of the flow path. 
         FIG.  13    is a plan view of the flow path. 
         FIG.  14    is a plan view obtained by extracting a first supply path and a second supply path. 
         FIG.  15    is a side view obtained by extracting the first supply path and the second supply path. 
         FIG.  16    is a plan view of a first filter chamber group and a second filter chamber group. 
         FIG.  17    is a plan view obtained by extracting the first filter chamber group. 
         FIG.  18    is a plan view obtained by extracting a first discharge path and a second discharge path. 
         FIG.  19    is a side view of the first discharge path and the second discharge path. 
         FIG.  20    is a plan view illustrating a modification example of the first filter chamber group. 
         FIG.  21    is a plan view illustrating a modification example of the first filter chamber group. 
         FIG.  22    is a perspective view illustrating a part of the first supply path. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, the present disclosure will be described in detail based on embodiments. However, the following description shows one aspect of the present disclosure, and can be changed in any manner within the scope of the present disclosure. Those having the same reference numerals in each drawing indicate the same members, and the description thereof will be omitted as appropriate. In each of the drawings, X, Y, and Z represent three spatial axes orthogonal to each other. In the present specification, the directions along these axes are the X direction, the Y direction, and the Z direction. The direction in which the arrows in each drawing are oriented is described as the positive (+) direction, and the opposite direction of the arrows is described as the negative (−) direction. The Z direction indicates a vertical direction, the +Z direction indicates a vertically downward direction, and the −Z direction indicates a vertically upward direction. Furthermore, the three spatial axes X, Y, and Z, which do not limit the positive direction and the negative direction, will be described as an X-axis, a Y-axis, and a Z-axis. In the following Embodiment 1, as an example, the “first direction” is the +X direction, the “second direction” is the +Y direction, and the “third direction” is the +Z direction. 
     Embodiment 1 
       FIG.  1    is a view illustrating a schematic configuration of an ink jet type recording apparatus  1  which is an example of a “liquid ejecting apparatus” according to Embodiment 1 of the present disclosure. 
     As illustrated in  FIG.  1   , the ink jet type recording apparatus  1  which is an example of the liquid ejecting apparatus is a printing apparatus that performs printing of an image or the like by arranging dots formed on a medium S by ejecting and landing ink, which is a type of liquid, as ink droplets on the medium S, such as a printing paper sheet. As the medium S, any material such as a resin film or cloth can be used in addition to a recording paper sheet. 
     The ink jet type recording apparatus  1  includes a head module  100  including an ink jet type recording head  10  (hereinafter, also simply referred to as a recording head  10 ) which is an example of a “liquid ejecting head”, a liquid container  2 , a control unit  3  which is a control section, a transport mechanism  4  for sending out the medium S, and a moving mechanism  6 . 
     The liquid container  2  individually stores a plurality of types (for example, a plurality of colors) of ink ejected from the head module  100 . Examples of the liquid container  2  include a cartridge that can be attached to and detached from the ink jet type recording apparatus  1 , a bag-like ink pack formed of a flexible film, an ink tank that can be refilled with ink, and the like. Although not particularly illustrated, a plurality of types of ink having different colors or types are stored in the liquid container  2 . 
     Although not particularly illustrated, the control unit  3  includes, for example, a control apparatus such as a central processing unit (CPU) or a field programmable gate array (FPGA) and a storage apparatus such as a semiconductor memory. The control unit  3  comprehensively controls each element of the ink jet type recording apparatus  1 , that is, the transport mechanism  4 , the moving mechanism  6 , the head module  100 , and the like by executing the program stored in the storage apparatus by the control apparatus. 
     The transport mechanism  4  is an example of the “transport section” controlled by the control unit  3  to transport the medium S in the −X direction or +X direction, and has, for example, a transport roller  4   a . The transport mechanism  4  that transports the medium S is not limited to the transport roller  4   a , and may transport the medium S by a belt or a drum. 
     The moving mechanism  6  is controlled by the control unit  3  to reciprocate the head module  100  in the +Y direction and the −Y direction along the Y-axis. The +Y direction and the −Y direction in which the head module  100  reciprocates by the moving mechanism  6  are directions intersecting with the −X direction or the +X direction in which the medium S is transported. 
     The moving mechanism  6  of the present embodiment includes a transport body  7  and a transport belt  8 . The transport body  7  is a substantially box-shaped structure for accommodating the head module  100 , a so-called carriage, and is fixed to the transport belt  8 . The transport belt  8  is an endless belt erected along the Y-axis. The rotation of the transport belt  8  under the control of the control unit  3  causes the head module  100  to reciprocate together with the transport body  7  in the +Y direction and the −Y direction along the Y-axis. It is also possible to mount the liquid container  2  on the transport body  7  together with the head module  100 . 
     In the present embodiment, two liquid containers  2  are provided, and ink is supplied from the two liquid containers  2  to one recording head  10 . In  FIG.  1   , the plurality of liquid containers  2  are collectively illustrated as one. The two liquid containers  2  corresponding to one recording head  10  are referred to as a liquid container  2 A and a liquid container  2 B, respectively. A supply tube TAin and a discharge tube TAout are coupled to the liquid container  2 A. A supply tube TBin and a discharge tube TBout are coupled to the liquid container  2 B. The supply tube TAin, the discharge tube TAout, the supply tube TBin, and the discharge tube TBout are also collectively referred to as a tube. 
     The supply tube TAin and the supply tube TBin are tubes that supply the ink of the liquid container  2 A and the liquid container  2 B, which is set to have a predetermined pressure by a pump  200 , to the recording head  10 . The discharge tube TAout and the discharge tube TBout are tubes that discharge the ink discharged from the recording head  10  to the liquid container  2 A and the liquid container  2 B. 
     The liquid container  2 A, the liquid container  2 B, and the above-described tube are provided for each recording head  10 . 
     The recording head  10  ejects the ink supplied from the liquid container  2  onto the medium S as ink droplets, which are liquid droplets, under the control of the control unit  3 . The ink droplets are ejected from the recording head  10  in the +Z direction. When the medium S is transported in the −X direction or the +X direction by the transport mechanism  4  and the recording head  10  is transported along the Y-axis by the moving mechanism  6 , the recording head  10  ejects ink droplets onto the medium S, and accordingly, a desired image is formed on the medium S. 
     The head module  100  will be described in detail with reference to  FIGS.  2  and  3   .  FIG.  2    is an exploded perspective view of the head module  100  according to the present embodiment.  FIG.  3    is a plan view of the head module  100 . 
     The head module  100  includes a support  101  and a plurality of recording heads  10 . The support  101  is a plate-shaped member that supports a plurality of recording heads  10 . The support  101  is provided with a support hole  102  for holding each recording head  10 . In the present embodiment, the support holes  102  are provided independently for each recording head  10 . It is needless to say that the support holes  102  may be continuously provided over the plurality of recording heads  10 . 
     The recording head  10  is inserted through the support hole  102 , and a flange section  35  (refer to  FIG.  4   ) of the recording head  10  described later is supported by the peripheral edge portion of the support hole  102 . The head chip  44  (refer to  FIG.  6   ) side of the recording head  10  protrudes from the surface of the support  101  on the +Z direction side. 
     Each recording head  10  is provided with fixing ports  103  at both end portions in the +X direction and the −X direction. The support  101  is provided with a screw hole  104  for fixing each recording head  10 . Each recording head  10  is fixed to the support  101  by screwing a screw  105  into the screw hole  104  through the fixing port  103 . 
     In the present embodiment, a total of eight recording heads  10  including two along the X-axis and four along the Y-axis, are fixed to the support  101 . Each recording head  10  is disposed such that the parallel direction of nozzles N, which will be described later, matches the X-axis. 
     Here, the recording head  10  of the present embodiment will be described with reference to  FIGS.  4  to  8   .  FIG.  4    is a perspective view of the recording head  10 .  FIG.  5    is an exploded perspective view of the recording head  10  when viewed in the +Z direction.  FIG.  6    is an exploded perspective view of the recording head  10  when viewed in the −Z direction.  FIG.  7    is a plan view for describing a shape of the recording head  10 .  FIG.  8    is a plan view of the head chip  44  provided on the recording head  10  when viewed in the +Z direction. 
     As illustrated in  FIGS.  5  to  8   , the recording head  10  has a shape which is long in the +X direction and short in the +Y direction. Here, the fact that the recording head  10  is long in the +X direction and short in the +Y direction means that a long side E 1  is disposed along the +X direction and a short side E 2  is disposed along the +Y direction when a rectangle with the smallest area including the recording head  10  is set to R, when the recording head  10  is viewed in the +Z direction. 
     The recording head  10  includes: a plurality of head chips  44  provided with the nozzles N for discharging ink droplets; a holder  30  for holding the head chips  44 ; a flow path member  60  for supplying ink to the head chips  44 ; a connector  75  to which a wiring for transmitting and receiving control signals and the like to and from the head chip  44  is coupled; and a cover member  65  for accommodating the flow path member  60  inside. In the present embodiment, one recording head  10  includes two head chips  44 . As will be described in detail later, the two head chips  44  are disposed at different positions in the +X direction. Therefore, in the present embodiment, with respect to the two head chips  44 , the head chip  44  disposed on the +X direction side is referred to as a first head chip  44 A, and the head chip  44  disposed on the −X direction side is referred to as a second head chip  44 B. 
     Here, the head chip  44  of the present embodiment will be further described with reference to  FIGS.  9  and  10   .  FIG.  9    is a sectional view of the head chip  44 .  FIG.  10    is a view schematically illustrating the flow path of the first head chip  44 A. Each direction of the head chip  44  will be described based on the direction when the head chip  44  is used for the recording head  10 , that is, the X direction, the Y direction, and the Z direction. Hereinafter, in the description of the configuration common to the first head chip  44 A and the second head chip  44 B, the description will be made as the head chip  44 , but unique configurations of each of the first head chip  44 A and the second head chip  44 B will be described as the first head chip  44 A or the second head chip  44 B. 
     As illustrated in  FIGS.  9  and  10   , the head chip  44  of the present embodiment is a structure in which a pressure chamber substrate  482 , a diaphragm  483 , a piezoelectric actuator  484 , a housing section  485 , and a protective substrate  486  are disposed on the −Z direction side, which is one side of a flow path forming substrate  481 , and a nozzle plate  487  and a buffer plate  488  are disposed on the +Z direction side, which is the other side of the flow path forming substrate  481 . 
     The flow path forming substrate  481 , the pressure chamber substrate  482 , and the nozzle plate  487  are formed of, for example, a silicon flat plate material, and the housing section  485  is formed, for example, by injection molding of a resin material. The plurality of nozzles N are formed on the nozzle plate  487 . The surface of the nozzle plate  487  opposite to the flow path forming substrate  481  is a nozzle surface. 
     The flow path forming substrate  481  is formed with an opening portion  481 A, an individual flow path  481 B which is a throttle flow path, and a communication flow path  481 C. The individual flow path  481 B and the communication flow path  481 C are through holes formed for each nozzle N, and the opening portion  481 A is a continuous opening over the plurality of nozzles N. The buffer plate  488  is a compliance substrate made of a flat plate material which is installed on the surface of the flow path forming substrate  481  opposite to the pressure chamber substrate  482  and closes the opening portion  481 A. The pressure fluctuation in the opening portion  481 A is absorbed by the flexible deformation of the buffer plate  488 . 
     A manifold SR, which is a common liquid chamber communicating with the opening portion  481 A of the flow path forming substrate  481 , is formed in the housing section  485 . The manifold SR is a space for storing ink supplied to the plurality of nozzles N, and is continuously provided over the plurality of nozzles N. As illustrated in  FIG.  10   , the housing section  485  is provided with an introduction port Rin through which ink is supplied to the manifold SR from the upstream and a discharge port Rout through which ink is discharged from the manifold SR to the downstream. In  FIG.  10   , the introduction port Rin is indicated by “in” and the discharge port Rout is indicated by “out”. As will be described in detail later, the introduction port Rin is coupled to supply pipes PAin and PBin of the flow path member  60  via a first supply path Sa and a second supply path Sb, and the discharge port Rout is coupled to discharge pipes PAout and PBout of the flow path member  60  via a first discharge path Da and a second discharge path Db. 
     In the present embodiment, as illustrated in  FIGS.  8  and  10   , the head chip  44  is provided with a nozzle row in which the nozzles N are arranged side by side along the +X direction, which is the first direction. In the head chip  44 , a plurality of nozzle rows, in which the nozzles N are arranged side by side in the +X direction, are provided in the +Y direction, and in the present embodiment, two nozzle rows are provided. In the present embodiment, of the two nozzle rows provided on one head chip  44 , one disposed in the −Y direction is referred to as a nozzle row La, and the other disposed in the +Y direction is referred to as a nozzle row Lb. In the present embodiment, the nozzle row La and the nozzle row Lb are collectively referred to as a nozzle row L. In these two rows of nozzle rows La and nozzle rows Lb, the positions of the respective nozzles N may be the same in the +X direction, that is, may overlap each other when viewed in the +Y direction, and the other nozzle row Lb may be disposed to be offset from one nozzle row La by half a pitch of the nozzle N in the +X direction. 
     In the present embodiment, the two rows of the nozzle rows La and nozzle rows Lb of the first head chip  44 A are referred to as a first nozzle row La 1  and a third nozzle row Lb 1 . Of the two introduction ports Rin of the first head chip  44 A, the introduction port Rin communicating with the first nozzle row La 1  is referred to as a first introduction port Rin 1 , and the introduction port Rin communicating with the third nozzle row Lb 1  is referred to as a third introduction port Rin 3 . 
     The two rows of nozzle rows La and nozzle rows Lb of the second head chip  44 B are referred to as a second nozzle row La 2  and a fourth nozzle row Lb 2 . Of the two introduction ports Rin of the second head chip  44 B, the introduction port Rin communicating with the second nozzle row La 2  is referred to as a second introduction port Rin 2 , and the introduction port Rin communicating with the fourth nozzle row Lb 2  is referred to as a fourth introduction port Rin 4 . 
     As illustrated in  FIG.  10   , the introduction port Rin of the first head chip  44 A is disposed on one end side of the manifold SR with respect to the parallel direction of the nozzles N, and in the present embodiment, on the −X direction side, and the discharge port Rout is disposed on the other end side of the manifold SR with respect to the parallel direction of the nozzles N, and in the present embodiment, on the +X direction side. The ink supplied from the introduction port Rin into the manifold SR is discharged from the discharge port Rout to the outside of the manifold SR. In other words, the ink circulates in the manifold SR. In other words, one head chip  44  is formed with two ink circulation flow paths leading to the introduction port Rin, the manifold SR coupled to one nozzle row L, and the discharge port Rout. 
     As illustrated in  FIG.  8   , the introduction port Rin of the second head chip  44 B is disposed on the other end side of the manifold SR with respect to the parallel direction of the nozzles N, that is, on the +X direction side, and the discharge port Rout is disposed on one end side of the manifold SR with respect to the parallel direction of the nozzles N, that is, on the −X direction side. 
     In other words, the positions of the introduction port Rin and the discharge port Rout of the first head chip  44 A and the second head chip  44 B are reversed to each other in the +X direction. 
     An opening portion  482 A is formed for each nozzle N in the pressure chamber substrate  482  of the head chip  44 . The diaphragm  483  is an elastically deformable flat plate material installed on the surface of the pressure chamber substrate  482  opposite to the flow path forming substrate  481 . The space sandwiched between the diaphragm  483  and the flow path forming substrate  481  inside each opening portion  482 A of the pressure chamber substrate  482  functions as a pressure chamber SC filled with ink supplied from the manifold SR via the individual flow paths  481 B. Each pressure chamber SC communicates with the nozzle N via the communication flow path  481 C of the flow path forming substrate  481 . 
     The piezoelectric actuator  484  is formed for each nozzle N on the surface of the diaphragm  483  opposite to the pressure chamber substrate  482 . Each piezoelectric actuator  484  is also called a piezoelectric element, and is a driving element in which a piezoelectric body is interposed between electrodes facing each other. The piezoelectric actuator  484  deforms based on the driving signal to vibrate the diaphragm  483  and fluctuate the pressure of the ink in the pressure chamber SC, and accordingly, the ink in the pressure chamber SC is ejected from the nozzle N. The protective substrate  486  also protects the plurality of piezoelectric actuators  484 . 
     Instead of the piezoelectric actuator  484 , a so-called electrostatic actuator can be used in which a heat generating element is disposed in the flow path to discharge ink droplets from the nozzle N by a bubble generated by the heat of the heat generating element, or electrostatic force is generated between the diaphragm  483  and the electrode and the diaphragm  483  is deformed by the electrostatic force to discharge ink droplets from the nozzle N. 
     The head chip  44  is provided to be long in the +X direction, which is the parallel direction of the nozzles N. Here, the fact that the head chip  44  is long in the +X direction means that the long side of the rectangle having the smallest area including the head chip  44  is disposed along the +X direction when the head chip  44  is viewed in the +Z direction. The head chip  44  is provided to be short in the +Y direction. In other words, the short side of the rectangle having the smallest area including the head chip  44  is disposed along the +Y direction when the head chip  44  is viewed in the +Z direction. In this manner, by providing the head chip  44  to be long in the parallel direction of the nozzles N, the length of the nozzle row L in which the nozzles N are arranged side by side can be ensured, and the increase in size of the head chip  44  in the +Y direction can be suppressed. 
     As illustrated in  FIGS.  5  to  8    and the like, a plurality of such head chips  44  are provided in one recording head  10 , and in the present embodiment, two are provided. Specifically, the two head chips  44  are held in the common holder  30  of the recording head  10 . 
     The holder  30  is provided with a recess portion  33  that is open on the surface on the +Z direction side, and a recessed accommodation section  31  is provided on the bottom surface of the recess portion  33 , that is, the surface of the recess portion  33  on the −Z direction side. The recess portion  33  has an opening having a size and shape in which a fixing plate  36  is fitted and fixed. The accommodation section  31  has an opening having a size and shape sufficient to accommodate the head chip  44 . 
     The holder  30  is provided with a plurality of communication paths  34  for circulating ink between the head chip  44  and the flow path member  60 . One end of the communication path  34  is open on the bottom surface of the accommodation section  31 , that is, the surface in the −Z direction in the accommodation section  31 , and communicates with each of the two introduction ports Rin and the two discharge ports Rout of the head chip  44 . Therefore, four communication paths  34  are provided for each head chip  44 . The other end of the communication path  34  is open on the surface of the holder  30  on the −Z direction side, and communicates with the first supply path Sa, the second supply path Sb, the first discharge path Da, and the second discharge path Db of the flow path member  60 , which will be described in detail later. 
     The holder  30  is provided with a plurality of wiring insertion holes  39  through which a wiring (not illustrated) coupled to the head chip  44  and a relay substrate  73  is inserted. The wiring insertion hole  39  is provided so as to be open on the bottom surface of the accommodation section  31 , that is, the surface of the accommodation section  31  on the −Z direction side, and open on the surface of the holder  30  on the −Z direction side. 
     A pair of flange sections  35  protruding respectively in the +X direction and the −X direction are provided on the −Z direction side of the holder  30 . The fixing port  103  through which the above-described screw  105  is inserted is provided in the flange section  35  so as to penetrate in the +Z direction. 
     Each head chip  44  is fixed to the fixing plate  36 . Specifically, the fixing plate  36  is formed in a shape accommodated in the recess portion  33 , and an exposed opening portion  37  is formed at a predetermined location. Each head chip  44  is fixed to the fixing plate  36  with an adhesive or the like such that the buffer plate  488  is covered with the fixing plate  36  and the nozzle N, that is, the nozzle plate  487 , is exposed from the exposed opening portion  37 . The head chip  44  fixed to the fixing plate  36  in this manner is accommodated in the accommodation section  31  such that the nozzle plate  487  side is on the +Z direction side. The fixing plate  36  is fixed to the recess portion  33  with an adhesive or the like. The surface of the head chip  44  on the −Z direction side adheres to the bottom portion of the accommodation section  31 , that is, the surface of the inner surface of the accommodation section  31  on the −Z direction side, with an adhesive. 
     In other words, the head chip  44  is accommodated in the space formed by the accommodation section  31  and the fixing plate  36 , and the nozzle N is exposed from the exposed opening portion  37 . The accommodation section  31  may be provided in common across the plurality of head chips  44 . 
     As illustrated in  FIG.  6   , the plurality of head chips  44  held in the holder  30  are disposed such that the positions on the XY plane defined by the X-axis and the Y-axis are different from each other. In other words, the two head chips  44  are provided at positions where the two head chips  44  do not overlap each other in a plan view when viewed in the +Z direction. In other words, the first nozzle row La 1  and the second nozzle row La 2  are disposed to be offset from each other at different positions in both the +X direction and the +Y direction. The fact that the two head chips  44  are disposed at different positions on the XY plane means that the nozzle surfaces of the head chips  44  are provided at different positions from each other. Therefore, the parts of the plurality of head chips  44  other than the nozzle surfaces may be provided so as to overlap each other when viewed in the +Z direction. In the present embodiment, as illustrated in  FIG.  8   , the first head chip  44 A is disposed on the +X direction side, and the second head chip  44 B is disposed on the −X direction side. 
     In the present embodiment, as illustrated in  FIG.  8   , the nozzle rows L of the two head chips  44  are disposed at positions so as to partially overlap each other in the +X direction, and the continuous rows of the nozzles N in the +X direction are formed. In other words, by disposing the first nozzle row La 1  of the first head chip  44 A and the second nozzle row La 2  of the second head chip  44 B so as to partially overlap each other when viewed in the +Y direction, the continuous rows of the nozzles N along the +X direction can be formed by the first nozzle row La 1  and the second nozzle row La 2 . The expression “by disposing the first nozzle row La 1  of the first head chip  44 A and the second nozzle row La 2  of the second head chip  44 B so as to partially overlap each other when viewed in the +Y direction” may include a case where the range in which the first nozzle row La 1  of the first head chip  44 A exists in the +X direction, that is, the range from the nozzle N disposed in the most +X direction of the first nozzle row La 1  to the nozzle N disposed in the most −X direction, overlaps the range in which the second nozzle row La 2  of the second head chip  44 B exists in the +X direction, that is, the range from the nozzle N disposed in the most +X direction of the second nozzle row La 2  to the nozzle N disposed in the most −X direction, when viewed in the +Y direction. In other words, the expression is not limited to a configuration in which the nozzle N that forms the first nozzle row La 1  of the first head chip  44 A and the nozzle N that forms the second nozzle row La 2  of the second head chip  44 B are necessarily positioned at the same position in the +X direction. 
     Similarly, by disposing the third nozzle row Lb 1  of the first head chip  44 A and the fourth nozzle row Lb 2  of the second head chip  44 B so as to overlap each other when viewed in the +Y direction, the continuous rows of the nozzles N along the +X direction can be formed by the third nozzle row Lb 1  and the fourth nozzle row Lb 2 . The definition “by disposing the third nozzle row Lb 1  of the first head chip  44 A and the fourth nozzle row Lb 2  of the second head chip  44 B so as to partially overlap each other when viewed in the +Y direction” is the same as the above-described definition “by disposing the first nozzle row La 1  of the first head chip  44 A and the second nozzle row La 2  of the second head chip  44 B so as to partially overlap each other when viewed in the +Y direction”, and thus, the duplicate description thereof will be omitted. 
     In this manner, by disposing the first introduction port Rin 1  of the first head chip  44 A on the −X direction side of the first head chip  44 A, and the second introduction port Rin 2  of the second head chip  44 B on the +X direction side of the second head chip  44 B, the first introduction port Rin 1  and the second introduction port Rin 2  can be disposed at positions relatively close to each other in the +X direction. However, by disposing the first nozzle row La 1  and the second nozzle row La 2  so as to partially overlap each other when viewed in the +Y direction, the first introduction port Rin 1  communicating with the first nozzle row La 1  and the second introduction port Rin 2  communicating with the second nozzle row La 2  are disposed to be offset from each other in the +X direction. 
     Similarly, by disposing the third introduction port Rin 3  of the first head chip  44 A on the −X direction side of the first head chip  44 A, and the fourth introduction port Rin 4  of the second head chip  44 B on the +X direction side of the second head chip  44 B, the third introduction port Rin 3  and the fourth introduction port Rin 4  can be disposed at positions relatively close to each other in the +X direction. However, by disposing the third nozzle row Lb 1  and the fourth nozzle row Lb 2  so as to partially overlap each other when viewed in the +Y direction, the third introduction port Rin 3  communicating with the third nozzle row Lb 1  and the fourth introduction port Rin 4  communicating with the fourth nozzle row Lb 2  are disposed to be offset from each other in the +X direction. In the present embodiment, the first introduction port Rin 1  and the third introduction port Rin 3  are disposed at positions offset from the second introduction port Rin 2  and the fourth introduction port Rin 4  on the −X direction side. 
     Here, the shape of the recording head  10  in a plan view when viewed in the +Z direction will be described with reference to  FIG.  7   . The recording head  10  includes a first part P 1  (a part illustrated by a hatch in  FIG.  7   ), a second part P 2 , and a third part P 3 . 
     When the rectangle having the smallest area including the recording head  10  is set to R, the long side E 1  of the rectangle R overlaps the side along the +X direction of the holder  30 , and the short side E 2  of the rectangle R overlaps the side along the +Y direction of the holder  30 . The center line parallel to the long side E 1  of such a virtual rectangle R is set to L 1 . 
     The first part P 1  is a rectangular part through which the center line L 1  passes. 
     The second part P 2  is a rectangular part protruding from the first part P 1  in the −X direction opposite to the +X direction. In the second part P 2 , a dimension W 2  in the +Y direction is smaller than a dimension W 1  of the first part P 1  in the +Y direction. Furthermore, the second part P 2  is disposed to be shifted with respect to the first part P 1  in the +Y direction or in the −Y direction opposite to the +Y direction. The fact that the second part P 2  is disposed to be shifted with respect to the first part P 1  in the +Y direction or the −Y direction means that the position of a center line L 2  of the second part P 2  does not match the center line L 1  of the first part P 1 , and the center line L 2  is offset from the center line L 1  in the +Y direction or the −Y direction. It is preferable that the side surfaces of the first part P 1  and the second part P 2  are continuous on a straight line. It is needless to say that the present disclosure is not limited thereto, and the side surfaces of the first part P 1  and the second part P 2  may not be continuous on a straight line. 
     It is preferable that, in the second part P 2 , the dimension W 2  in the +Y direction is smaller than half the dimension W 1  of the first part P 1  in the +Y direction (W 2 &lt;W 1 /2), and the second part P 2  is disposed in the +Y direction or the −Y direction opposite to the +Y direction with respect to the center of the first part P 1 . In other words, the second part P 2  is disposed with dimensions and positions in the +Y direction such that the center line L 1  indicating the center of the first part P 1  does not pass therethrough. Accordingly, the size of the recording head  10  can be further reduced in the +Y direction, and thus, the plurality of recording heads  10  can be easily disposed on the support  101 , and the size of the head module  100  can be reduced in the +Y direction. The nozzle rows of the recording heads  10  can be arranged in the +X direction while overlapping each other in the +X direction. It is needless to say that the second part P 2  may have the dimension W 2  in the +Y direction through which the center line L 1  passes, and may be disposed to be shifted in the +Y direction such that the center line L 1  passes through the second part P 2 . 
     The third part P 3  is a rectangular part protruding from the first part P 1  in the +X direction. In the third part P 3 , the dimension in the +Y direction is smaller than the dimension of the first part P 1  in the +Y direction. The third part P 3  is disposed to be shifted in the +Y direction or the −Y direction opposite to the +Y direction with respect to the first part P 1 . The fact that the third part P 3  is disposed to be shifted in the +Y direction or the −Y direction with respect to the first part P 1  means that the position of a center line L 3  of the third part P 3  does not match the center line L 1  of the first part P 1 , and the center line L 3  is offset from the center line L 1  in the +Y direction or the −Y direction. 
     The third part P 3  of the present embodiment has a width in the +Y direction such that the center line L 1  does not pass therethrough, and is disposed to be shifted in the −Y direction with respect to the first part P 1 . It is needless to say that the third part P 3  may have the width in the +Y direction through which the center line L 1  passes, and may be disposed at a position shifted in the −Y direction such that the center line L 1  passes through the third part P 3 . 
     The nozzle surfaces of the head chip  44  are disposed at different positions in the +X direction and the +Y direction in the first part P 1 , the second part P 2 , and the third part P 3 . As illustrated in  FIG.  8   , when the recording heads  10  are arranged side by side in the +X direction to form the head module  100 , the second part P 2  of one recording head  10  (the recording head  10  disposed in the +X direction in  FIG.  8   ) and the third part P 3  of the other recording head  10  (the recording head  10  disposed in the −X direction in  FIG.  8   ) are disposed to face each other in the +Y direction, and accordingly, the nozzles N of the recording head  10 , which are adjacent to each other in the +X direction, can partially overlap each other in the +X direction, and the continuous rows of the nozzles N in the +X direction can be formed. When the recording heads  10  are arranged side by side in the +X direction, the size can be reduced in the +Y direction by providing the second part P 2  and the third part P 3 . 
     In the present embodiment, the recording head  10  is provided with the third part P 3 , but the present disclosure is not particularly limited thereto, and the third part P 3  may not be provided. In other words, when the recording heads  10  are arranged side by side in the +X direction to form the head module  100 , the second part P 2  of one recording head  10  and the second part P 2  of the other recording head  10  are disposed to face each other in the +Y direction, and accordingly, the nozzles N of the recording head  10 , which are adjacent to each other in the +X direction, can partially overlap each other in the +X direction, and the continuous rows of the nozzles N in the +X direction can be formed. However, when three or more recording heads  10  are arranged side by side in the +X direction, it is possible to easily form continuous nozzles N in the +X direction by providing the third part P 3  in the recording head  10 , and the size can be reduced in the +Y direction. 
     Here, the flow path member  60  will be further described with reference to  FIG.  11   .  FIG.  11    is a schematic view describing the flow path. 
     As illustrated in  FIGS.  5  and  11   , the flow path member  60  is a member in which the flow path for supplying ink to the head chip  44  is formed. The flow path member  60  of the present embodiment includes the first supply path Sa and the second supply path Sb for supplying ink to the head chip  44 , and the first discharge path Da and the second discharge path Db for discharging ink from the head chip  44 . As described above, since two manifolds SR are provided in the head chip  44  of the present embodiment and the introduction port Rin and the discharge port Rout are provided in each of the manifolds SR, two types of ink are supplied and discharged and circulates in the head chip  44 . Therefore, the flow path member  60  includes: the first supply path Sa that communicates with each of the two introduction ports Rin provided in different head chips  44 ; the second supply path Sb that communicates with each of the two introduction ports Rin provided in different head chips  44 ; the first discharge path Da that communicates with each of the two discharge ports Rout provided in different head chips  44 ; and a second discharge path Db that communicates with each of the two discharge ports Rout provided in different head chips  44 . 
     On the surface of the flow path member  60  on the −Z direction side, the cylindrical supply pipe PAin, the supply pipe PBin, the discharge pipe PAout, and the discharge pipe PBout protruding in the −Z direction are provided. As illustrated in  FIG.  7   , a first introduction section Sa 1  which is a part of the first supply path Sa is provided inside the supply pipe PAin, and a second introduction section Sb 1  which is a part of the second supply path Sb is provided inside the supply pipe PBin. A first discharge section Da 3  which is a part of the first discharge path Da is provided inside the discharge pipe PAout, and a second discharge section Db 3  which is a part of the second discharge path Db is provided inside the discharge pipe PBout. 
     A tube is coupled to each of the supply pipes PAin and PBin and the discharge pipes PAout and PBout, or the tube can be removed. The supply tube TAin is coupled to the supply pipe PAin, the supply tube TBin is coupled to the supply pipe pBIN. The discharge tube TAout is coupled to the discharge pipe PAout, and the discharge tube TBout is coupled to the discharge pipe PBout. 
     The first supply path Sa is branched into two in the flow path member  60 , which will be described in detail later. Each of the branched flow paths communicates with the communication path  34  (refer to  FIG.  5   ) formed in the holder  30 . Similarly, the second supply path Sb is branched into two in the flow path member  60 . Each of the branched flow paths communicates with the communication path  34  (refer to  FIG.  5   ) formed in the holder  30 . 
     The first discharge path Da is branched into two in the flow path member  60 . Each of the branched flow paths communicates with the communication path  34  (refer to  FIG.  5   ) formed in the holder  30 . Similarly, the second discharge path Db is branched into two in the flow path member  60 . Each of the branched flow paths communicates with the communication path  34  (refer to  FIG.  5   ) formed in the holder  30 . 
     The ink in the liquid container  2 A is boosted to a predetermined pressure by the pump  200  and supplied to the first supply path Sa via the supply tube TAin and the supply pipe PAin. The ink is branched in the first supply path Sa and is supplied to one introduction port Rin of the two head chips  44  via the communication path  34  of the holder  30 . Specifically, the ink supplied to the first supply path Sa is supplied to the first introduction port Rin 1  of the first head chip  44 A and the second introduction port Rin 2  of the second head chip  44 B. The ink supplied to the second supply path Sb is supplied to the third introduction port Rin 3  of the first head chip  44 A and the fourth introduction port Rin 4  of the second head chip  44 B. The ink discharged from the discharge ports Rout of the two head chips  44  merges at the first discharge path Da via the communication path  34  of the holder  30 , and returns to the liquid container  2 A via the discharge pipe PAout and the discharge tube TAout. The liquid container  2 A, the supply tube TAin, the supply pipe PAin, the discharge pipe PAout, and the discharge tube TAout are configured to hold the nozzles N of each of the first head chip  44 A and the second head chip  44 B at a negative pressure within a predetermined range. 
     The ink in the liquid container  2 B is boosted to a predetermined pressure by the pump  200  and supplied to the second supply path Sb via the supply tube TBin and the supply pipe PBin. The ink is branched in the second supply path Sb and is supplied to the other introduction port Rin of the two head chips  44  via the communication path  34 . The ink discharged from the discharge ports Rout of the two head chips  44  merges at the second discharge path Db via the communication path  34 , and returns to the liquid container  2 B via the discharge pipe PBout and the discharge tube TBout. Similar to the liquid container  2 A, the liquid container  2 B, the supply tube TBin, the supply pipe PBin, the discharge pipe PBout, and the discharge tube TBout are configured to hold the nozzles N of each of the first head chip  44 A and the second head chip  44 B at a negative pressure within a predetermined range. 
     As described above, the holder  30  is provided with the communication path  34  through which ink flows, and the holder  30  also functions as a flow path member. 
     As illustrated in  FIG.  5   , the flow path member  60  is accommodated in the cover member  65  fixed to the −Z side of the holder  30 . 
     The cover member  65  is provided with four through holes  67  on the surface on the −Z direction side, and the supply pipe PAin, the supply pipe PBin, the discharge pipe PAout, and the discharge pipe PBout are exposed to the outside from these four through holes  67 . 
     As illustrated in  FIGS.  4  and  5   , the relay substrate  73  having the connector  75  is accommodated inside the cover member  65 . The connector  75  provided on the relay substrate  73  is exposed to the outside from a coupling opening portion  63 , which is a through hole provided on the surface of the cover member  65  on the −Z direction side, and the wiring (not illustrated) coupled to the control unit  3  on the outside is coupled to the connector  75 . 
     The above-described supply pipe PAin and supply pipe PBin, that is, the first introduction section Sa 1  and the second introduction section Sb 1  described in detail later are provided in the second part P 2  of the recording head  10 . The discharge pipe PAout and the discharge pipe PBout, that is, the first discharge section Da 3  and the second discharge section Db 3  described in detail later, are provided in the third part P 3  of the recording head  10 . The connector  75 , which is an electrical element of the present embodiment, is provided in the first part P 1  of the recording head  10 . In the present embodiment, the supply pipe PAin provided with the first introduction section Sa 1  and the supply pipe PBin provided with the second introduction section Sb 1  are disposed in this order in the +X direction. In other words, the first introduction section Sa 1  and the second introduction section Sb 1  are disposed at the same position in the +Y direction and at different positions in the +X direction, and the second introduction section Sb 1  is disposed on the +X direction side of the first introduction section Sa 1  while using the first introduction section Sa 1  as a reference. In the present embodiment, the first introduction section Sa 1  and the second introduction section Sb 1  are disposed such that the positions in the +Y direction are the same, but it is needless to say that the present disclosure is not limited thereto, and the first introduction section Sa 1  and the second introduction section Sb 1  may be positioned at different positions in the +Y direction. Similarly, the two discharge pipes PAout and PBout are arranged side by side in the +X direction in this order. 
     In this manner, by providing the first introduction section Sa 1 , the second introduction section Sb 1 , the first discharge section Da 3 , and the second discharge section Db 3  in the second part P 2  and the third part P 3 , it is not necessary to provide a space for providing the first introduction section Sa 1 , the second introduction section Sb 1 , the first discharge section Da 3 , and the second discharge section Db 3  in the flow path member  60  on the outside of the first part P 1 , the second part P 2 , and the third part P 3 , and the increase in size of the flow path member  60  can be suppressed. By providing the first introduction section Sa 1 , the second introduction section Sb 1 , the first discharge section Da 3 , and the second discharge section Db 3  in the second part P 2  and the third part P 3 , the connector  75  can be provided in the first part P 1 , and the size of the flow path member  60  can be reduced by effectively utilizing the space. Furthermore, by providing the first introduction section Sa 1 , the second introduction section Sb 1 , the first discharge section Da 3 , and the second discharge section Db 3  in the second part P 2  and the third part P 3 , the supply pipe PAin, the supply pipe PBin, the discharge pipe PAout, and the discharge pipe PBout can be provided at a position away from the connector  75  provided in the first part P 1 . Therefore, the ink leaked when the tubes are attached to and detached from each of the supply pipe PAin, the supply pipe PBin, the discharge pipe PAout, and the discharge pipe PBout, which are provided with the first introduction section Sa 1 , the second introduction section Sb 1 , the first discharge section Da 3 , and the second discharge section Db 3 , is unlikely to adhere to the connector  75 , and an electrical defect caused by the ink adhering to the connector  75  can be suppressed. 
     It is preferable that a dimension W 3  of the first introduction section Sa 1  in the +Y direction is at least half the dimension W 2  of the second part P 2  in the +Y direction (W 3W2 /2). It is preferable that a dimension W 4  of the second introduction section Sb 1  in the +Y direction is at least half the dimension W 2  of the second part P 2  in the +Y direction (W 4W2 /2). In this manner, by setting each of the dimensions W 3  and W 4  of the first introduction section Sa 1  and the second introduction section Sb 1  to be at least half the dimension W 2  of the second part P 2 , the supply performance can be improved by enlarging the first introduction section Sa 1  and the second introduction section Sb 1 . Even when the first introduction section Sa 1  and the second introduction section Sb 1  are disposed to be offset from each other in the +X direction in order to reduce the dimension W 2  of the second part P 2  in the +Y direction, as will be described later in detail, by disposing the first introduction section Sa 1 , the second introduction section Sb 1 , a first filter chamber group Fa, and a second filter chamber group Fb in this order in the +X direction, it is possible to reduce the variation in the flow path length between a first supply flow path Sa 2  that couples the first introduction section Sa 1  and the first filter chamber group Fa to each other and a second supply flow path Sb 2  that couples the second introduction section Sb 1  and the second filter chamber group Fb to each other. Therefore, it is possible to reduce the variation in the pressure loss between the first supply flow path Sa 2  and the second supply flow path Sb 2 . 
     Here, the flow paths provided in the flow path member  60  and the holder  30  will be further described with reference to  FIGS.  12  to  20   .  FIG.  12    is a perspective view of a flow path mainly formed inside the flow path member  60 .  FIG.  13    is a plan view of the flow path mainly formed inside the flow path member  60 .  FIG.  14    is a plan view obtained by extracting the first supply path Sa and the second supply path Sb.  FIG.  15    is a side view obtained by extracting the first supply path Sa and the second supply path Sb.  FIG.  16    is a plan view of the first filter chamber group Fa and the second filter chamber group Fb.  FIG.  17    is a plan view obtained by extracting the first filter chamber group Fa.  FIG.  18    is a plan view obtained by extracting the first discharge path Da and the second discharge path Db.  FIG.  19    is a side view obtained by extracting the first discharge path Da and the second discharge path Db. 
     As illustrated in  FIG.  5   , the flow path member  60  of the present embodiment includes a plurality of flow path substrates laminated on the Z-axis, and in the present embodiment, five flow path substrates. In the present embodiment, the five flow path substrates laminated on the Z-axis are sequentially referred to as a first flow path substrate  81 , a second flow path substrate  82 , a third flow path substrate  83 , a fourth flow path substrate  84 , and a fifth flow path substrate  85  from the −Z direction side to the +Z direction side. 
     As illustrated in  FIG.  12   , the flow path member  60  is provided with the first supply path Sa and the second supply path Sb, and the first discharge path Da and the second discharge path Db. Different types of ink are supplied to the flow path member  60  in each of the first supply path Sa and the second supply path Sb. In the present embodiment, the two inks are referred to as ink Ia and ink Ib, respectively. 
     Here, as illustrated in  FIGS.  12  to  15   , the first supply path Sa includes the first introduction section Sa 1 , the first supply flow path Sa 2 , the first filter chamber group Fa having a first filter chamber Fa 1  and a second filter chamber Fa 2 , a first outflow flow path Sa 3 , and a second outflow flow path Sa 4 , from the upstream to the downstream. 
     The first introduction section Sa 1  is for introducing the ink Ia into the flow path member  60  from the outside, and is provided so as to penetrate the first flow path substrate  81  and the second flow path substrate  82  over the Z-axis from the inside of the supply pipe PAin protruding in the −Z direction of the first flow path substrate  81 . 
     One end of the first supply flow path Sa 2  is coupled to the first introduction section Sa 1 , the first supply flow path Sa 2  is branched in the middle, and the other two branched ends are respectively coupled to the first filter chamber Fa 1  and the second filter chamber Fa 2  that form the first filter chamber group Fa. Specifically, the first supply flow path Sa 2  includes a first supply section Sa 21 , a first penetration section Sa 22 , a first linking section Sa 23 , a first coupling section Sa 24 , and a first branch section Sa 25 , from the upstream to the downstream. 
     The first supply section Sa 21  extends along the in-plane direction of the XY plane including the X-axis and the Y-axis at the interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other. One end of the first supply section Sa 21  is coupled to the first introduction section Sa 1 . 
     The first penetration section Sa 22  is provided to penetrate the second flow path substrate  82  on the Z-axis such that one end is coupled to the other end of the first supply section Sa 21  and the other end is open on the surface of the second flow path substrate  82  on the −Z direction side. 
     The first linking section Sa 23  extends along the in-plane direction of the XY plane at the interface where the first flow path substrate  81  and the second flow path substrate  82  are fixed to each other. One end of the first linking section Sa 23  is coupled to the other end of the first penetration section Sa 22 , which is open on the surface of the second flow path substrate  82  on the −Z direction side. 
     The first coupling section Sa 24  is provided to penetrate the second flow path substrate  82  on the Z-axis such that one end is coupled to the other end of the first linking section Sa 23  and the other end is open on the surface of the second flow path substrate  82  on the +Z direction side. 
     The first branch section Sa 25  corresponds to “branch flow path”, and extends along the in-plane direction of the XY plane at the interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other. The middle of the first branch section Sa 25  is coupled to the other end of the first coupling section Sa 24 , which is open on the surface of the second flow path substrate  82  on the +Z direction side. The part where the first coupling section Sa 24  and the first branch section Sa 25  are coupled to each other is a first branch position Sc 1  where the first supply flow path Sa 2  is branched and the ink, which is a liquid, is distributed to the first filter chamber Fa 1  and the second filter chamber Fa 2 . 
     One end of the first branch section Sa 25  is coupled to the first filter chamber Fa 1 , and the other end thereof is coupled to the second filter chamber Fa 2 . 
     The flow path of the first supply section Sa 21 , the first linking section Sa 23 , the first branch section Sa 25 , and the like, which are described above, may be formed by forming a recess portion in one substrate and covering the recess portion with the other substrate, and may be formed by forming the recess portions on both substrates and aligning the openings of both recess portions. 
     Here, the first filter chamber Fa 1  is provided at an interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other. The first filter chamber Fa 1  is formed by aligning the openings of the recess portion provided in the second flow path substrate  82  and the recess portion provided in the third flow path substrate  83 . A filter F is provided in the first filter chamber Fa 1 . The filter F is provided at an interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other, and the first filter chamber Fa 1  is divided into a first upstream filter chamber Fa 11  on the upstream and a first downstream filter chamber Fa 12  on the downstream. In other words, the recess portion provided in the second flow path substrate  82  is the first upstream filter chamber Fa 11 , and the recess portion provided in the third flow path substrate  83  is the first downstream filter chamber Fa 12 . The filter F provided in the first filter chamber Fa 1  is for capturing foreign substances such as air bubbles or dust contained in the ink, and filtering the ink, and for example, a sheet-like filter in which a plurality of micropores are formed by finely weaving or knitting fibers such as metal and resin, or a filter in which a plurality of micropores penetrate through a plate-shaped member such as metal or resin, can be used. As the filter F, for example, a non-woven fabric such as metal or resin may be used. 
     As illustrated in  FIGS.  16  and  17   , the first filter chamber Fa 1  has a shape elongated in the +Y direction. The first filter chamber Fa 1  of the present embodiment has a shape in which the corners of the rectangle are rounded based on a rectangle in which the side along the +Y direction is the long side and the side along the +X direction is the short side when viewed in the +Z direction. In this manner, by forming the first filter chamber Fa 1  into a shape in which the corners of the rectangle are rounded from the +Z direction, the air bubbles contained in the ink are less likely to stay in the corner portions, and the discharge properties of the air bubbles can be improved. The shape of the first filter chamber Fa 1  is not particularly limited thereto, and may be an ellipse having a long axis in the +Y direction, a polygon, a square, or an elongated shape in the +X direction. In other words, the fact that the first filter chamber Fa 1  is elongated in the +Y direction means that the long side of the rectangle having the smallest area including the first filter chamber Fa 1  is disposed along the +Y direction when the first filter chamber Fa 1  is viewed in the +Z direction. 
     One end of the first branch section Sa 25  of the first supply flow path Sa 2  is coupled to the first filter chamber Fa 1 . The fact that the first supply flow path Sa 2  communicates with the first filter chamber Fa 1  means that the first supply flow path Sa 2  communicates with the first upstream filter chamber Fa 11  on the upstream of the filter F of the first filter chamber Fa 1 . In other words, one end of the first branch section Sa 25  of the first supply flow path Sa 2  is provided to be open on the inner wall surface of the first upstream filter chamber Fa 11 . In the present embodiment, the opening of the first branch section Sa 25  that is open on the inner surface of the first filter chamber Fa 1  is referred to as a first inlet Fa 1 _in. 
     The first filter chamber Fa 1  has a first outlet Fa 1 _out through which ink flows out. Here, the fact that the first filter chamber Fa 1  has the first outlet Fa 1 _out means that the first outlet Fa 1 _out is provided on the downstream separated by the filter F of the first filter chamber Fa 1 , that is, in the first downstream filter chamber Fa 12 . The first outlet Fa 1  out is an opening of the first outflow flow path Sa 3 , which is open on the inner wall of the first filter chamber Fa 1 . 
     The first outflow flow path Sa 3  includes a first outflow penetration section Sa 31 , a first outflow section Sa 32 , and a first outflow coupling section Sa 33 . 
     The first outflow penetration section Sa 31  is provided to penetrate the third flow path substrate  83  on the Z-axis such that one end is open on the surface of the first downstream filter chamber Fa 12  on the +Z direction side and the other end is open on the surface of the third flow path substrate  83  on the +Z direction side. 
     The first outflow section Sa 32  extends along the in-plane direction of the XY plane at the interface where the third flow path substrate  83  and the fourth flow path substrate  84  are fixed to each other. One end of the first outflow section Sa 32  is coupled to the first outflow penetration section Sa 31 . The first outflow section Sa 32  may be formed by providing a recess portion in either the third flow path substrate  83  or the fourth flow path substrate  84  and covering the recess portion with the other one, and may be formed by forming recess portions on both of the third flow path substrate  83  and the fourth flow path substrate  84  and aligning the openings of both of the recess portions with each other. 
     The first outflow coupling section Sa 33  is provided to penetrate the fourth flow path substrate  84  on the Z-axis such that one end is coupled to the first outflow section Sa 32  and the other end is open on the surface of the fourth flow path substrate  84  on the +Z direction side. The other end of the first outflow coupling section Sa 33 , which is open on the surface of the fourth flow path substrate  84  on the +Z direction side is coupled to the first introduction port Rin 1  of the first head chip  44 A via the communication path  34  of the holder  30 . 
     Meanwhile, the second filter chamber Fa 2  is provided at an interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other. In other words, the second filter chamber Fa 2  of the present embodiment is provided at the same interface as the first filter chamber Fa 1 . The second filter chamber Fa 2  is formed by aligning the openings of the recess portion provided in the second flow path substrate  82  and the recess portion provided in the third flow path substrate  83 . The filter F is provided in the second filter chamber Fa 2 . The filter F is provided at an interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other, and the second filter chamber Fa 2  is divided into a second upstream filter chamber Fa 21  on the upstream and a second downstream filter chamber Fa 22  on the downstream. As the filter F provided in the second filter chamber Fa 2 , the same filter F as the filter F disposed in the first filter chamber Fa 1  can be used. 
     The second filter chamber Fa 2  has a shape elongated in the +Y direction. The second filter chamber Fa 2  of the present embodiment has a shape in which the corners of the rectangle are rounded based on a rectangle in which the side along the +Y direction is the long side and the side along the +X direction is the short side, when viewed in the +Z direction. In this manner, by forming the second filter chamber Fa 2  into a shape in which the corners of the rectangle are rounded from the +Z direction, the air bubbles contained in the ink are less likely to stay in the corner portions, and the discharge properties of the air bubbles can be improved. The shape of the second filter chamber Fa 2  is not particularly limited thereto, and may be the same as any of the shapes of the first filter chamber Fa 1  illustrated above. In the present embodiment, the second filter chamber Fa 2  has the same shape as the first filter chamber Fa 1  when viewed in the +Z direction. In this manner, by forming the first filter chamber Fa 1  and the second filter chamber Fa 2  in the same shape, it is possible to reduce the variation in the effective area of the filter F provided in each of the first filter chamber Fa 1  and the second filter chamber Fa 2 , and to reduce the variation in the pressure loss due to the variation in the effective area of the filter F. 
     The other end of the first branch section Sa 25  of the first supply flow path Sa 2  is coupled to the second filter chamber Fa 2 . Here, the fact that the first supply flow path Sa 2  communicates with the second filter chamber Fa 2  means that the first supply flow path Sa 2  communicates with the second upstream filter chamber Fa 21  on the upstream of the filter F of the second filter chamber Fa 2 . In other words, the other end of the first branch section Sa 25  of the first supply flow path Sa 2  is provided to be open on the inner wall surface of the second upstream filter chamber Fa 21 . In the present embodiment, the opening of the first branch section Sa 25  that is open on the inner surface of the second filter chamber Fa 2  is referred to as a second inlet Fa 2 _in. 
     The second filter chamber Fa 2  has a second outlet Fa 2 _out through which ink flows out. Here, the fact that the second filter chamber Fa 2  has the second outlet Fa 2 _out means that the second outlet Fa 2 _out is provided on the downstream separated by the filter F of the second filter chamber Fa 2 , that is, in the second downstream filter chamber Fa 22 . The second outlet Fa 2 _out is an opening of the second outflow flow path Sa 4  that is open on the inner wall of the second filter chamber Fa 2 . 
     The second outflow flow path Sa 4  includes a second outflow penetration section Sa 41 , a second outflow section Sa 42 , and a second outflow coupling section Sa 43 . 
     The second outflow penetration section Sa 41  is provided to penetrate the third flow path substrate  83  on the Z-axis such that one end is open on the surface of the second downstream filter chamber Fa 22  on the +Z direction side and the other end is open on the surface of the third flow path substrate  83  on the +Z direction side. 
     The second outflow section Sa 42  extends along the in-plane direction of the XY plane at the interface where the third flow path substrate  83  and the fourth flow path substrate  84  are fixed to each other. One end of the second outflow section Sa 42  is coupled to the second outflow penetration section Sa 41 . The second outflow section Sa 42  may be formed by providing a recess portion in either the third flow path substrate  83  or the fourth flow path substrate  84  and covering the recess portion with the other one, and may be formed by forming recess portions on both of the third flow path substrate  83  and the fourth flow path substrate  84  and aligning the openings of both of the recess portions with each other. 
     The second outflow coupling section Sa 43  is provided to penetrate the fourth flow path substrate  84  on the Z-axis such that one end is coupled to the second outflow section Sa 42  and the other end is open on the surface of the fourth flow path substrate  84  on the +Z direction side. The other end of the second outflow coupling section Sa 43 , which is open on the surface of the fourth flow path substrate  84  on the +Z direction side, is coupled to the second introduction port Rin 2  of the second head chip  44 B via the communication path  34  of the holder  30 . 
     The first filter chamber group Fa having the first filter chamber Fa 1  and the second filter chamber Fa 2  that form the first supply path Sa is formed in the first part P 1  illustrated in  FIG.  7   . By providing the first filter chamber group Fa in the first part P 1  in this manner, a space for providing the first filter chamber group Fa can be ensured, the filter F having a relatively large area can be provided, the pressure loss due to the filter F can be reduced, and the occurrence of supply failure can be suppressed. 
     The first filter chamber Fa 1  and the second filter chamber Fa 2  are provided at the interface between the second flow path substrate  82  and the third flow path substrate  83 , which are the same interfaces. The first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed at intervals in the +Y direction. In other words, the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed so as not to overlap each other when viewed in the +X direction. 
     As illustrated in  FIG.  17   , the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed so as to at least partially overlap each other when viewed in the +Y direction. The first filter chamber Fa 1  and the second filter chamber Fa 2  may be disposed at positions so as to completely overlap each other when viewed in the +Y direction. In the present embodiment, the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed to be offset from each other in the +X direction so as to partially overlap each other when viewed in the +Y direction. In the present embodiment, the second filter chamber Fa 2  is disposed at a position offset from the first filter chamber Fa 1  in the +X direction. In other words, a part of the first filter chamber Fa 1  on the −X direction side and a part of the second filter chamber Fa 2  on the +X direction side are disposed so as to overlap each other when viewed in the +Y direction. In this manner, as the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed to be offset from each other in the +X direction so as to partially overlap each other when viewed in the +Y direction, in the recording head  10  in which the nozzle rows are disposed to be offset from each other, even when the two introduction ports Rin are offset from each other in the +X direction, the distance between the first filter chamber Fa 1  and the introduction port Rin and the distance between the second filter chamber Fa 2  and the introduction port Rin can be shortened. Therefore, it is possible to reduce the variation in the pressure loss of the ink supplied to the two introduction ports Rin. In other words, even when the first introduction port Rin 1  of the first head chip  44 A to which ink is supplied from the first filter chamber Fa 1  and the second introduction port Rin 2  of the second head chip  44 B to which ink is supplied from the second filter chamber Fa 2  are disposed to be offset from each other in the +X direction, by disposing the first filter chamber Fa 1  and the second filter chamber Fa 2  to be offset from each other in the +X direction, the distance from the first filter chamber Fa 1  to the first introduction port Rin 1  of the first head chip  44 A and the distance from the second filter chamber Fa 2  to the second introduction port Rin 2  of the second head chip  44 B can be shortened. Therefore, it is possible to reduce the variation in the pressure loss between the first outflow flow path Sa 3  and the second outflow flow path Sa 4 . Therefore, it is preferable that the amount of deviation between the first filter chamber Fa 1  and the second filter chamber Fa 2  in the +X direction is approximately the same as the amount of deviation between the first introduction port Rin 1  and the second introduction port Rin 2  in the +X direction. In this manner, by setting the amount of deviation between the first filter chamber Fa 1  and the second filter chamber Fa 2  in the +X direction to be approximately the same as the amount of deviation between the first introduction port Rin 1  and the second introduction port Rin 2  in the +X direction, it is possible to suppress the variation between the flow path length from the first filter chamber Fa 1  to the first introduction port Rin 1  of the first head chip  44 A and the flow path length from the second filter chamber Fa 2  to the second introduction port Rin 2  of the second head chip  44 B, and to reduce the variation in the discharge characteristics of ink droplets discharged from the first nozzle row La 1  communicating with the first introduction port Rin 1  and the second nozzle row La 1  communicating with the second introduction port Rin 2 . 
     Since the distance between the first filter chamber Fa 1  and the introduction port Rin and the distance between the second filter chamber Fa 2  and the introduction port Rin can be shortened, it is possible to reduce the amount of ink to be discarded when the air bubbles staying on the downstream of the filter F of the recording head  10  is discharged from the nozzle N by performing suction cleaning by a maintenance mechanism (not illustrated). The maintenance mechanism (not illustrated) includes, at least, a negative pressure generation unit such as a cap capable of sealing the nozzle surface on which the nozzle N is formed, a waste liquid flow path communicating with the cap, and a pump for making the inside of the cap have a negative pressure in a state where the nozzle surface is sealed. 
     It is preferable that a width W 5  in the +X direction of the part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other when viewed in the +Y direction is smaller than half a width W 6  of the first filter chamber Fa 1  in the +X direction (W 5 &lt;W 6 /2). In this manner, by setting the width W 5  where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other to be smaller than half the width W 6  of the first filter chamber Fa 1 , even when the first inlet Fa 1 _in is disposed at the end portion of the first filter chamber Fa 1 , and even when the second inlet Fa 2 _in is disposed at the end portion of the second filter chamber Fa 2 , it is possible to make the first filter chamber Fa 1  and the second filter chamber Fa 2  easily get closer to each other in the +Y direction. By bringing the first filter chamber Fa 1  and the second filter chamber Fa 2  closer to each other in the +Y direction, the size of the recording head  10  can be reduced in the +Y direction. By bringing the first filter chamber Fa 1  and the second filter chamber Fa 2  closer to each other in the +Y direction, the head chips  44  arranged side by side in the +Y direction can get closer to each other in the +Y direction, and it is possible to reduce the difference in the discharge timing of ink droplets discharged from different head chips  44 . Therefore, it is possible to suppress the deviation of the landing position of the ink droplet on the medium S. 
     The first branch position Sc 1  where the first coupling section Sa 24  and the first branch section Sa 25  communicate with each other is provided between the first filter chamber Fa 1  and the second filter chamber Fa 2  in a plan view when viewed in the +Z direction. 
     Here, the fact that the first branch position Sc 1  is disposed between the first filter chamber Fa 1  and the second filter chamber Fa 2  in a plan view in the +Z direction is that the first branch position Sc 1  is within the range of a region S 1  sandwiched between the first filter chamber Fa 1  and the second filter chamber Fa 2  which are illustrated by hatching in  FIG.  17   . In other words, the region S 1  sandwiched between the first filter chamber Fa 1  and the second filter chamber Fa 2  is a region sandwiched between the first filter chamber Fa 1  and the second filter chamber Fa 2 , between a tangent S 1   a  in the −X direction, which is in contact with both the first filter chamber Fa 1  and the second filter chamber Fa 2 , and a tangent S 1   b  in the +X direction, which is in contact with both the first filter chamber Fa 1  and the second filter chamber Fa 2 , when viewed in the +Z direction. 
     Incidentally, the first branch position Sc 1  refers to a center position Sa 24   c  of the opening of the first coupling section Sa 24 , which is open to the first branch section Sa 25 . Therefore, when the center position Sa 24   c  of the first branch position Sc 1  is within the range of the region S 1 , the other parts may be outside the range of the region S 1 . 
     In this manner, by disposing the first branch position Sc 1  between the first filter chamber Fa 1  and the second filter chamber Fa 2 , it is possible to reduce the flow path length of the first branch section Sa 25  from the first branch position Sc 1  to the first filter chamber Fa 1  and the second filter chamber Fa 2 , and to elongate the flow path length of the common flow path from the first introduction section Sa 1  to the first branch position Sc 1  before branching. Therefore, the layout of the first supply flow path Sa 2  can be simplified as compared with a case where the flow path length of the first branch section Sa 25  is elongated. 
     The first inlet Fa 1 _in in which ink flows into the first filter chamber Fa 1  from the first supply flow path Sa 2  and the second inlet Fa 2 _in in which ink flows into the second filter chamber Fa 2  from the first supply flow path Sa 2  are disposed at a part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other when viewed in the +Y direction, that is, within the range of S 2  illustrated in  FIG.  17   . 
     In this manner, by disposing the first inlet Fa 1 _in and the second inlet Fa 2 _in within the range of a region S 3  of the part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other, the flow path length of the first branch section Sa 25  from the first branch position Sc 1  to the first inlet Fa 1 _in and the flow path length of the first branch section Sa 25  from the first branch position Sc 1  to the second inlet Fa 2 _in can be made relatively shortened. Therefore, it is possible to further reduce the variation in the pressure loss between the first branch section Sa 25  from the first branch position Sc 1  to the first inlet Fa 1 _in and the first branch section Sa 25  from the first branch position Sc 1  to the second inlet Fa 2 _in. Incidentally, when the first inlet Fa 1 _in and the second inlet Fa 2 _in are disposed outside the range of the region S 2  of the part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other, the flow path length from the first branch position Sc 1  to the first inlet Fa 1 _in and the second inlet Fa 2 _in is elongated, and the variation in the pressure loss proportional to the flow path length also increases. 
     The first inlet Fa 1 _in is disposed on the surface of the first filter chamber Fa 1  facing the second filter chamber Fa 2 , and the second inlet Fa 2 _in is disposed on the surface of the second filter chamber Fa 2  facing the first filter chamber Fa 1 . In other words, the first inlet Fa 1 _in is disposed on the surface of the first filter chamber Fa 1  in the +Y direction, and the second inlet Fa 2 _in is disposed on the surface of the second filter chamber Fa 2  in the −Y direction. In this manner, by disposing the first inlet Fa 1 _in on the surface of the first filter chamber Fa 1  facing the second filter chamber Fa 2 , and by disposing the second inlet Fa 2 _in on the surface of the second filter chamber Fa 2  facing the first filter chamber Fa 1 , the first branch position Sc 1  can be disposed immediately before the first filter chamber Fa 1  and the second filter chamber Fa 2 . It is needless to say that the first inlet Fa 1 _in may be disposed on a surface other than the surface of the first filter chamber Fa 1  in the +Y direction, that is, a surface in the +Z direction, a surface in the −Z direction, a surface in the +X direction, a surface in the −X direction, and a surface in the −Y direction. However, when the first inlet Fa 1 _in is disposed on a surface other than the surface in the +Y direction, as compared with a case where the first inlet Fa 1 _in is provided on the surface in the +Y direction, the first branch position Sc 1  cannot be disposed immediately before the first filter chamber Fa 1 , the flow path length of the first branch section Sa 25  is elongated, and thus, the variation in the pressure loss of the first branch section Sa 25  occurs. By disposing the first inlet Fa 1 _in on the surface of the first filter chamber Fa 1  facing the second filter chamber Fa 2 , the first branch position Sc 1  is disposed immediately before the first filter chamber Fa 1 , it is possible to shorten the flow path length of the first branch section Sa 25 , and to reduce the variation in the pressure loss of the first branch section Sa 25 . The same applies to the second inlet Fa 2 _in. 
     A width W 7  of the first inlet Fa 1 _in in the +X direction and a width W 8  of the second inlet Fa 2 _in in the +X direction are smaller than the width W 5  in the +X direction of the part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other when viewed in the +Y direction (W 7 &lt;W 5 , W 8 &lt;W 5 ). In this manner, by setting the width W 7  of the first inlet Fa 1 _in and the width W 8  of the second inlet Fa 2 _in to be smaller than the width W 5  in the +X direction of the part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other when viewed in the +Y direction, it is possible to increase the flow velocity of the ink flowing into the first filter chamber Fa 1  and the second filter chamber Fa 2 , and to discharge the air bubbles contained in the ink in the first filter chamber Fa 1  and the second filter chamber Fa 2  to the downstream, that is, to improve the so-called air bubble discharge properties. 
     The first branch section Sa 25  is formed on a straight line that connects the first inlet Fa 1 _in and the second inlet Fa 2 _in to each other. The first branch section Sa 25  is disposed to be inclined with respect to the +X direction and the +Y direction. In the present embodiment, the first inlet Fa 1 _in is provided at the end portion of the first filter chamber Fa 1  on the +X direction side, and the second inlet Fa 2 _in is provided at the end portion of the second filter chamber Fa 2  on the −X direction side. As described above, the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed to be offset from each other in the +X direction so as to partially overlap each other when viewed in the +Y direction. Therefore, the second inlet Fa 2 _in is disposed on the −X direction side with respect to the first inlet Fa 1 _in. Therefore, the first branch section Sa 25  is formed along a vector direction having components in the −X direction and the +Y direction from the first inlet Fa 1 _in toward the second inlet Fa 2 _in. 
     A part of the first branch section Sa 25  and a part of the inner wall of the first filter chamber Fa 1  are continuously provided along the +Y direction in a plan view when viewed in the +Z direction. In other words, an inner wall Sa 25   a  of the first branch section Sa 25  in the +X direction is continuously provided together with an inner wall Fa 1   a  of the first filter chamber Fa 1  in the +X direction on a straight line along the +Y direction. In other words, the inner wall Sa 25   a  of the first branch section Sa 25  and the inner wall Fa 1   a  of the first filter chamber Fa 1  are provided to be flush with each other. 
     By continuously providing the inner wall Sa 25   a  of the first branch section Sa 25  and the inner wall Fa 1   a  of the first filter chamber Fa 1  along the +Y direction, the ink from the first branch section Sa 25  flows into the first filter chamber Fa 1  from the first inlet Fa 1  in along the inner walls Sa 25   a  and Fa 1   a . Therefore, it is possible to suppress a decrease in the flow velocity of the ink when flowing into the first filter chamber Fa 1 , and to improve the discharge properties of air bubbles contained in the ink in the first filter chamber Fa 1 , so-called air bubble discharge properties. 
     Similarly, a part of the first branch section Sa 25  and a part of the inner wall of the second filter chamber Fa 2  are continuously provided along the +Y direction in a plan view when viewed in the +Z direction. In other words, an inner wall Sa 25   b  of the first branch section Sa 25  in the −X direction is continuously provided together with an inner wall Fa 2   a  of the second filter chamber Fa 2  in the −X direction on a straight line along the +Y direction. In other words, the inner wall Sa 25   b  of the first branch section Sa 25  and the inner wall Fa 2   a  of the second filter chamber Fa 2  are provided to be flush with each other. 
     In this manner, by continuously providing the inner wall Sa 25   b  of the first branch section Sa 25  and the inner wall Fa 2   a  of the second filter chamber Fa 2  along the +Y direction, the ink from the first branch section Sa 25  flows into the second filter chamber Fa 2  from the second inlet Fa 2  in along the inner walls Sa 25   b  and Fa 2   a . Therefore, it is possible to suppress a decrease in the flow velocity of the ink when flowing into the second filter chamber Fa 2 , and to improve the discharge properties of air bubbles contained in the ink in the second filter chamber Fa 2 , so-called air bubble discharge properties. 
     In the first branch section Sa 25 , between the first branch position Sc 1  and the first inlet Fa 1 _in, a part, of which the width in the +X direction is smaller than the width W 7  of the first inlet Fa 1 _in in the +X direction, is provided. In the present embodiment, in the first branch section Sa 25 , the inner wall in the −X direction and the inner wall of the first filter chamber Fa 1  in the +Y direction are coupled to each other on a curved surface, so-called R surface, and accordingly, the first branch section Sa 25  is provided with a first throttle section Sa 25   c  in which the width in the +X direction is smaller than that of the first inlet Fa 1 _in immediately before the first inlet Fa 1 _in. A width Wa 1  of the first throttle section Sa 25   c  is smaller than the width W 7  of the first inlet Fa 1 _in (Wa 1 &lt;W 7 ). 
     In this manner, by providing the first throttle section Sa 25   c  in the first branch section Sa 25 , it is possible to increase the flow velocity of the ink that flows into the first filter chamber Fa 1  from the first branch section Sa 25 , and to improve the discharge properties of the air bubbles contained in the ink in the first filter chamber Fa 1 . 
     Similarly, in the first branch section Sa 25 , between the first branch position Sc 1  and the second inlet Fa 2 _in, a part, of which the width in the +X direction is smaller than the width W 8  of the second inlet Fa 2 _in in the +X direction, is provided. In the present embodiment, in the first branch section Sa 25 , the inner wall in the +X direction and the inner wall of the second filter chamber Fa 2  in the −Y direction are coupled to each other on a curved surface, so-called R surface, the first branch section Sa 25  is provided with a second throttle section Sa 25   d  in which the width in the +X direction is smaller than that of the second inlet Fa 2 _in immediately before the second inlet Fa 2 _in. A width Wa 2  of the second throttle section Sa 25   d  is smaller than the width W 8  of the second inlet Fa 2 _in (Wa 2 &lt;W 8 ). 
     In this manner, by providing the second throttle section Sa 25   d  in the first branch section Sa 25 , it is possible to increase the flow velocity of the ink that flows into the second filter chamber Fa 2  from the first branch section Sa 25 , and to improve the discharge properties of the air bubbles contained in the ink in the second filter chamber Fa 2 . 
     In the present embodiment, as described above, the first branch section Sa 25 , the first inlet Fa 1 _in, and the second inlet Fa 2 _in are disposed at the same position in the +Z direction. In this manner, by providing the first branch section Sa 25  at the same position as the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction, it is possible to dispose the first branch position Sc 1  at the same position in the +Z direction as the first inlet Fa 1 _in and the second inlet Fa 2 _in. By disposing the first branch position Sc 1  at the same position in the +Z direction as the first inlet Fa 1 _in and the second inlet Fa 2 _in, it is possible to dispose the first branch position Sc 1  immediately before the first filter chamber Fa 1  and the second filter chamber Fa 2  as compared with the configuration in which the first branch position Sc 1  is disposed at the upper part on the Z-axis of the first filter chamber group Fa, that is, in the −Z direction, or at the lower part, that is, in the +Z direction. Therefore, it is possible to elongate the flow path length of the common part before the first branch position Sc 1  of the first supply path Sa, and to simplify the layout of the first supply path Sa. 
     It is needless to say that the first branch section Sa 25  is not particularly limited thereto, and a part of the first branch section Sa 25  may be disposed at a position different from those of the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction. The first branch position Sc 1  may be disposed at a position different from those of the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction. Furthermore, the first branch position Sc 1  may be disposed at the same position in the +Z direction as the first inlet Fa 1 _in and the second inlet Fa 2 _in, and a part of the first branch section Sa 25  may be disposed at a position different from those of the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction. 
     The first outlet Fa 1 _out is disposed at a part that does not overlap the second filter chamber Fa 2  when viewed in the +Y direction, and to be far from the second filter chamber Fa 2  with respect to a center Fa 1   c  of the first filter chamber Fa 1  in the +Y direction. In other words, the first outlet Fa 1 _out is disposed in the region S 3  on the outside of the region S 2  in the +X direction, that is, on the −X direction side of the region S 2  and on the −Y direction side of the center Fa 1   c  of the first filter chamber Fa 1  in the +Y direction. In other words, when the first filter chamber Fa 1  is viewed in the +Z direction, in the rectangle having the smallest area including the first filter chamber Fa 1 , the first inlet Fa 1 _in is provided at one corner portion that forms a diagonal, that is, at corner portions in the +X direction and the +Y direction, and the first outlet Fa 1 _out is provided at the other corner portion that forms a diagonal, that is, in the vicinity of the corner portions in the −X direction and the −Y direction. Therefore, it is possible to dispose the first outlet Fa 1 _out away from the first inlet Fa 1 _in, and it is possible to suppress the occurrence of stagnation of ink that flows into the first filter chamber Fa 1 . In other words, the ink in the first filter chamber Fa 1  flows fastest on the straight line that connects the first inlet Fa 1 _in and the first outlet Fa 1 _out to each other, and flows slowly as the ink moves away from the straight line. Therefore, by disposing the straight line that connects the first inlet Fa 1 _in and the first outlet Fa 1 _out to each other at a position away from the diagonal line of the first filter chamber Fa 1 , it is possible to reduce occurrence of stagnation of ink in the first filter chamber Fa 1 . 
     Similar to the first outlet Fa 1 _out, the second outlet Fa 2 _out is disposed at a part that does not overlap the first filter chamber Fa 1  when viewed in the +Y direction, and to be far from the first filter chamber Fa 1  with respect to a center Fa 2   c  of the second filter chamber Fa 2  in the +Y direction. In other words, the second outlet Fa 2 _out is disposed in the region S 4  on the outside of the region S 2  in the +X direction, that is, on the +X direction side of the region S 2 , and on the +Y direction side of the center Fa 2   c  of the second filter chamber Fa 2  in the +Y direction. Therefore, it is possible to dispose the second outlet Fa 2 _out away from the second inlet Fa 2 _in, and it is possible to reduce the occurrence of stagnation of ink that flows into the second filter chamber Fa 2 . 
     In other words, the first inlet Fa 1 _in and the first outlet Fa 1 _out, and the second inlet Fa 2 _in and the second outlet Fa 2 _out can be disposed at positions point-symmetrical with respect to the first branch position Sc 1 . 
     The ink flow from the first inlet Fa 1 _in to the first outlet Fa 1 _out and the ink flow from the second inlet Fa 2 _in to the second outlet Fa 2 _out can be reversed to each other. Therefore, the positions of the first outlet Fa 1 _out and the second outlet Fa 2 _out can be disposed at positions point-symmetrical with respect to the first branch position Sc 1 . Therefore, when the first nozzle row La 1  and the second nozzle row La 1  are offset from each other in the +X direction, the introduction port Rin communicating with each nozzle row L, that is, both the first introduction port Rin 1  and the second introduction port Rin 2  are offset from each other in the +X direction, but by aligning the deviation of the first introduction port Rin 1  and the second introduction port Rin 2  in the +X direction, it is possible to deviate the positions of the first outlet Fa 1 _out and the second outlet Fa 2 _out. Accordingly, it is possible to shorten the distance from the first outlet Fa 1 _out to the first introduction port Rin 1  and the distance from the second outlet Fa 2 _out to the second introduction port Rin 2 , and to suppress the variation in the pressure loss by the short flow path length. 
     The second supply path Sb has the same configuration as that of the first supply path Sa. In other words, as illustrated in  FIGS.  12  to  15   , the second supply path Sb includes the second introduction section Sb 1 , the second supply flow path Sb 2 , the second filter chamber group Fb having a third filter chamber Fb 1  and a fourth filter chamber Fb 2 , a third outflow flow path Sb 3 , and a fourth outflow flow path Sb 4 , from the upstream to the downstream. 
     The second introduction section Sb 1  is for introducing the ink Ib into the flow path member  60  from the outside, and is provided so as to penetrate the first flow path substrate  81 , the second flow path substrate  82 , and the third flow path substrate  83  over the Z-axis from the inside of the supply pipe PBin protruding in the −Z direction of the first flow path substrate  81 . 
     One end of the second supply flow path Sb 2  is coupled to the second introduction section Sb 1 , the second supply flow path Sb 2  is branched in the middle, and the other two branched ends are respectively coupled to the third filter chamber Fb 1  and the fourth filter chamber Fb 2  that form the second filter chamber group Fb. Specifically, the second supply flow path Sb 2  includes a second supply section Sb 21 , a second penetration section Sb 22 , a second linking section Sb 23 , a second coupling section Sb 24 , and a second branch section Sb 25 , from the upstream to the downstream. 
     The second supply section Sb 21 , the second penetration section Sb 22 , the second linking section Sb 23 , the second coupling section Sb 24 , and the second branch section Sb 25  of the second supply flow path Sb 2  respectively correspond to the first supply section Sa 21 , the first penetration section Sa 22 , the first linking section Sa 23 , the first coupling section Sa 24 , and the first branch section Sa 25  of the first supply flow path Sa 2 , and have almost the same configuration, and thus, the duplicate description thereof will be omitted. Incidentally, the second branch section Sb 25  corresponds to the “branch flow path”. In other words, the middle of the second branch section Sb 25  is coupled to the other end of the second coupling section Sb 24 , which is open on the surface of the second flow path substrate  82  on the +Z direction side. The part where the second coupling section Sb 24  and the second branch section Sb 25  are coupled to each other is a second branch position Sc 2  where the second supply flow path Sb 2  is branched and the ink, which is a liquid, is distributed to the third filter chamber Fb 1  and the fourth filter chamber Fb 2 . 
     The third filter chamber Fb 1  is provided at an interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other. The third filter chamber Fb 1  is formed by aligning the openings of the recess portion provided in the second flow path substrate  82  and the recess portion provided in the third flow path substrate  83  with each other. The filter F is provided in the third filter chamber Fb 1 . The filter F is provided at an interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other, and the third filter chamber Fb 1  is divided into a third upstream filter chamber Fb 11  on the upstream and a third downstream filter chamber Fb 12  on the downstream. In other words, the recess portion provided in the second flow path substrate  82  is the third upstream filter chamber Fb 11 , and the recess portion provided in the third flow path substrate  83  is the third downstream filter chamber Fb 12 . As the filter F provided in the third filter chamber Fb 1 , the same filter F as the filter F disposed in the first filter chamber Fa 1  can be used. 
     As illustrated in  FIG.  16   , similar to the first filter chamber Fa 1 , the third filter chamber Fb 1  has a shape elongated in the +Y direction. In the present embodiment, the third filter chamber Fb 1  has the same shape as that of the first filter chamber Fa 1  when viewed in the +Z direction. In this manner, by forming the first filter chamber Fa 1  and the third filter chamber Fb 1  in the same shape, it is possible to reduce the variation in the effective area of the filter F provided in each of the first filter chamber Fa 1  and the third filter chamber Fb 1 , and to reduce the variation in the pressure loss due to the variation in the effective area of the filter F. It is needless to say that the shape of the third filter chamber Fb 1  is not particularly limited thereto, and may be the same as any of the shapes of the first filter chamber Fa 1  exemplified above. 
     One end of the second branch section Sb 25  of the second supply flow path Sb 2  is coupled to the third filter chamber Fb 1 . Here, the fact that the second supply flow path Sb 2  communicates with the third filter chamber Fb 1  means that the second supply flow path Sb 2  communicates with the third upstream filter chamber Fb 11  on the upstream of the filter F of the third filter chamber Fb 1 . In other words, one end of the second branch section Sb 25  of the second supply flow path Sb 2  is provided to be open on the inner wall surface of the third upstream filter chamber Fb 11 . In the present embodiment, the opening of the second branch section Sb 25  that is open on the inner surface of the third filter chamber Fb 1  is referred to as a third inlet Fb 1 _in. 
     The third filter chamber Fb 1  has a third outlet Fb 1 _out through which ink flows out. Here, the fact that the third filter chamber Fb 1  has the third outlet Fb 1 _out means that the third outlet Fb 1 _out is provided on the downstream separated by the filter F of the third filter chamber Fb 1 , that is, in the third downstream filter chamber Fb 12 . The third outlet Fb 1 _out is an opening of the third outflow flow path Sb 3  that is open on the inner wall of the third filter chamber Fb 1 . 
     The third outflow flow path Sb 3  includes a third outflow penetration section Sb 31 , a third outflow section Sb 32 , and a third outflow coupling section Sb 33 . The third outflow penetration section Sb 31 , the third outflow section Sb 32 , and the third outflow coupling section Sb 33  that form the third outflow flow path Sb 3  are substantially the same as the first outflow penetration section Sa 31 , the first outflow section Sa 32 , and the first outflow coupling section Sa 33  that form the first outflow flow path Sa 1 , respectively, and thus, duplicate description thereof will be omitted. 
     The other end of the third outflow coupling section Sb 33  of the third outflow flow path Sb 3 , which is open on the surface of the fourth flow path substrate on the +Z direction side is coupled to the third introduction port Rin 3  of the first head chip  44 A via the communication path  34  of the holder  30 . 
     The fourth filter chamber Fb 2  is provided at an interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other. The fourth filter chamber Fb 2  is formed by aligning the openings of the recess portion provided in the second flow path substrate  82  and the recess portion provided in the third flow path substrate  83 . The filter F is provided in the fourth filter chamber Fb 2 . The filter F is provided at an interface where the second flow path substrate  82  and the third flow path substrate  83  are fixed to each other, and the fourth filter chamber Fb 2  is divided into a fourth upstream filter chamber Fb 21  on the upstream and a fourth downstream filter chamber Fb 22  on the downstream. As the filter F provided in the fourth filter chamber Fb 2 , the same filter F as the filter F disposed in the first filter chamber Fa 1  can be used. 
     Similar to the first filter chamber Fa 1 , the fourth filter chamber Fb 2  has a shape elongated in the +Y direction. In the present embodiment, the fourth filter chamber Fb 2  has the same shape as the third filter chamber Fb 1  when viewed in the +Z direction. In this manner, by forming the third filter chamber Fb 1  and the fourth filter chamber Fb 2  in the same shape, it is possible to reduce the variation in the effective area of the filter F provided in each of the third filter chamber Fb 1  and the fourth filter chamber Fb 2 , and to reduce the variation in the pressure loss due to the variation in the effective area of the filter F. It is needless to say that the shape of the fourth filter chamber Fb 2  is not particularly limited thereto, and may be the same as any of the shapes of the first filter chamber Fa 1  exemplified above. 
     The other end of the second branch section Sb 25  of the second supply flow path Sb 2  is coupled to the fourth filter chamber Fb 2 . Here, the fact that the second supply flow path Sb 2  communicates with the fourth filter chamber Fb 2  means that the second supply flow path Sb 2  communicates with the fourth upstream filter chamber Fb 21  on the upstream of the filter F of the fourth filter chamber Fb 2 . In other words, the other end of the second branch section Sb 25  of the second supply flow path Sb 2  is provided to be open on the inner wall surface of the fourth upstream filter chamber Fb 21 . In the present embodiment, the opening of the second branch section Sb 25 , which is open on the inner surface of the fourth filter chamber Fb 2 , is referred to as a fourth inlet Fb 2 _in. 
     The fourth filter chamber Fb 2  has a fourth outlet Fb 2 _out through which ink flows out. Here, the fact that the fourth filter chamber Fb 2  has the fourth outlet Fb 2 _out means that the fourth outlet Fb 2 _out is provided on the downstream separated by the filter F of the fourth filter chamber Fb 2 , that is, in the fourth downstream filter chamber Fb 22 . The fourth outlet Fb 2 _out is an opening of the fourth outflow flow path Sb 4 , which is open on the inner wall of the fourth filter chamber Fb 2 . 
     The fourth outflow flow path Sb 4  includes a fourth outflow penetration section Sb 41 , a fourth outflow section Sb 42 , and a fourth outflow coupling section Sb 43 . The fourth outflow penetration section Sb 41 , the fourth outflow section Sb 42 , and the fourth outflow coupling section Sb 43  that form the fourth outflow flow path Sb 4  are substantially the same as the second outflow penetration section Sa 41 , the second outflow section Sa 42 , and the second outflow coupling section Sa 43  that form the second outflow flow path Sa 4 , respectively, and thus, duplicate description thereof will be omitted. 
     The other end of the fourth outflow coupling section Sb 43  of the fourth outflow flow path Sb 4 , which is open on the surface of the fourth flow path substrate  84  on the +Z direction side is coupled to the fourth introduction port Rin 4  of the second head chip  44 B via the communication path  34  of the holder  30 . 
     Since the relationship between the third filter chamber Fb 1  and the fourth filter chamber Fb 2  is the same as the relationship between the first filter chamber Fa 1  and the second filter chamber Fb 2 , duplicate description thereof will be omitted. In other words, the first filter chamber Fa 1  corresponds to the third filter chamber Fb 1 , and the second filter chamber Fa 2  corresponds to the third filter chamber Fb 2 . Therefore, the relationship between the first filter chamber Fa 1  and the second filter chamber Fa 2  described above can be applied to the third filter chamber Fb 1  and the fourth filter chamber Fb 2 . Since the third inlet Fb 1 _in and the third outlet Fb 1 _out of the third filter chamber Fb 1  are the same as the first inlet Fa 1 _in and the first outlet Fa 1 _out of the first filter chamber Fa 1 , and thus, duplicate description thereof will be omitted. Similarly, since the fourth inlet Fb 2 _in and the third outlet Fb 2 _out of the fourth filter chamber Fb 2  are the same as the second inlet Fa 2 _in and the second outlet Fa 2 _out of the second filter chamber Fa 2 , and thus, duplicate description thereof will be omitted. 
     In the present embodiment, as illustrated in  FIGS.  12  to  15    and the like, the first introduction section Sa 1 , the second introduction section Sb 1 , the first filter chamber group Fa, and the second filter chamber group Fb are disposed in the +X direction in this order. 
     In other words, with reference to the first introduction section Sa 1  positioned most on the −X direction side, the second introduction section Sb 1  is positioned on the +X direction side of the first introduction section Sa 1 , the first filter chamber group Fa is positioned on the +X direction side of the second introduction section Sb 1 , and the second filter chamber group Fb is positioned on the +X direction side of the first filter chamber group Fa. The fact that the first filter chamber group Fa and the second filter chamber group Fb are disposed in the +X direction in this order means that a center C 2  of a region S 11  in the +X direction including the third filter chamber Fb 1  and the fourth filter chamber Fb 2  that form the second filter chamber group Fb is positioned in the +X direction, as compared with a center C 1  of a region S 10  in the +X direction including the first filter chamber Fa 1  and the second filter chamber Fa 2  that form the first filter chamber group Fa. Therefore, for example, the second filter chamber Fa 2  and the third filter chamber Fb 1  may be disposed so as to overlap each other when viewed in the +Y direction. 
     In this manner, by disposing the first introduction section Sa 1 , the second introduction section Sb 1 , the first filter chamber group Fa, and the second filter chamber group Fb in this order in the +X direction, it is possible to suppress the variation in the flow path length between a first supply flow path Sa 2  that couples the first introduction section Sa 1  and the first filter chamber group Fa to each other and a second supply flow path Sb 2  that couples the second introduction section Sb 1  and the second filter chamber group Fb to each other. Therefore, it is possible to reduce the variation in the pressure loss between the first supply flow path Sa 2  and the second supply flow path Sb 2 , and to reduce the variation in the supply pressure for supplying ink to each head chip  44 . Therefore, in each head chip  44 , it is possible to reduce the variation in the discharge characteristics of discharging the ink supplied from the first supply flow path Sa 2  and the discharge characteristics of discharging the ink supplied from the second supply flow path Sb 2 . In other words, it is possible to reduce the variation in the discharge characteristics of ink droplets between the nozzle rows for discharging ink, which have different supply paths in the first supply flow path Sa 2  and the second supply flow path Sb 2 , and to improve the print quality. 
     In the present embodiment, as illustrated in  FIG.  16   , the third filter chamber Fb 1  is disposed to be adjacent to the first filter chamber Fa 1  in the +X direction. In the present embodiment, the first filter chamber Fa 1  and the third filter chamber Fb 1  are arranged side by side in the +X direction such that the positions in the +Y direction are the same. In other words, the first filter chamber Fa 1  and the third filter chamber Fb 1  are disposed to partially, and in the present embodiment, completely overlap each other when viewed in the +X direction. 
     Similarly, the fourth filter chamber Fb 2  is disposed to be adjacent to the second filter chamber Fa 2  in the +X direction. In the present embodiment, the second filter chamber Fa 2  and the fourth filter chamber Fb 2  are arranged side by side in the +X direction such that the positions in the +Y direction are the same. In other words, the second filter chamber Fa 2  and the fourth filter chamber Fb 2  are disposed to partially, and in the present embodiment, completely overlap each other when viewed in the +X direction. 
     The second filter chamber Fa 2  and the third filter chamber Fb 1  of the present embodiment are disposed so as to partially overlap each other when viewed in the +Y direction. In this manner, by disposing the second filter chamber Fa 2  and the third filter chamber Fb 1  so as to partially overlap each other when viewed in the +Y direction, the first filter chamber group Fa and the second filter chamber group Fb can be disposed close to each other in the +X direction. Therefore, the size of the recording head  10  can be reduced in the +X direction. 
     In the present embodiment, in the first filter chamber group Fa, the second filter chamber Fa 2  is disposed at a position offset from the first filter chamber Fa 1  in the +X direction, and in the second filter chamber group Fb, the fourth filter chamber Fb 2  is disposed at a position offset from the third filter chamber Fb 1  in the +X direction. Thus, the second filter chamber Fa 2  and the third filter chamber Fb 1  are disposed so as to partially overlap each other when viewed in the +Y direction, but the present disclosure is not particularly limited thereto. For example, in the first filter chamber group Fa, the second filter chamber Fa 2  may be disposed at a position offset from the first filter chamber Fa 1  in the −X direction, and in the second filter chamber group Fb, the fourth filter chamber Fb 2  may be disposed at a position offset from the third filter chamber Fb 1  in the −X direction. In this case, the first filter chamber Fa 1  and the fourth filter chamber Fb 2  can be disposed so as to partially overlap each other when viewed in the +Y direction. 
     As illustrated in  FIG.  16   , in a plan view when viewed in the +Z direction, a line segment Ls 1  that connects the first outlet Fa 1 _out and the third outlet Fb 1 _out to each other, and a line segment Ls 2  that connects the first introduction port Rin 1  and the third introduction port Rin 3  to each other are disposed so as to overlap each other. The line segment Ls 1  is a line segment that connects the center of the first outlet Fa 1 _out and the center of the third outlet Fb 1 _out to each other. The line segment Ls 2  is a line segment that connects the center of the first introduction port Rin 1  and the center of the third introduction port Rin 3  to each other. The fact that the line segment Ls 1  and the line segment Ls 2  overlap each other in a plan view when viewed in the +Z direction includes the fact that the line segment Ls 1  and the line segment Ls 2  intersect with each other or completely match each other. In this manner, by disposing the first outlet Fa 1 _out, the third outlet Fb 1 _out, the first introduction port Rin 1 , and the third introduction port Rin 3  such that the line segment Ls 1  and the line segment Ls 2  overlap each other, it is possible to reduce the variation in the flow path length between the first outflow flow path Sa 3  on the downstream of the first filter chamber Fa 1  and the third outflow flow path Sb 3  on the downstream of the third filter chamber Fb 1 , and to reduce the variation in the pressure loss between the first outflow flow path Sa 3  and the third outflow flow path Sb 3 . Therefore, it is possible to reduce the variation in the discharge characteristics of the ink droplets of the ink Ia discharged from the first nozzle row La 1  communicating with the first introduction port Rin 1  and the ink droplets of the ink Ib discharged from the third nozzle row Lb 1  communicating with the third introduction port Rin 3 , and to improve the print quality. 
     The same applies to the second outlet Fa 2 _out, the fourth outlet Fb 2 _out, the second introduction port Rin 2 , and the fourth introduction port Rin 4 . In other words, in a plan view when viewed in the +Z direction, a line segment Ls 3  that connects the second outlet Fa 2 _out and the fourth outlet Fb 2 _out to each other, and a line segment Ls 4  that connects the second introduction port Rin 2  and the fourth introduction port Rin 4  to each other are disposed so as to overlap each other. The line segment Ls 3  is a line segment that connects the center of the second outlet Fa 2 _out and the center of the fourth outlet Fb 2 _out to each other. The line segment Ls 4  is a line segment that connects the center of the second introduction port Rin 2  and the center of the fourth introduction port Rin 4  to each other. The fact that the line segment Ls 3  and the line segment Ls 4  overlap each other in a plan view when viewed in the +Z direction includes the fact that the line segment Ls 3  and the line segment Ls 4  intersect with each other or completely match each other. In this manner, by disposing the second outlet Fa 2 _out, the fourth outlet Fb 2 _out, the second introduction port Rin 2 , and the fourth introduction port Rin 4  such that the line segment Ls 3  and the line segment Ls 4  overlap each other, it is possible to reduce the variation in the flow path length between the second outflow flow path Sa 4  on the downstream of the second filter chamber Fa 2  and the fourth outflow flow path Sb 4  on the downstream of the fourth filter chamber Fb 2 , and to reduce the variation in the pressure loss between the second outflow flow path Sa 4  and the fourth outflow flow path Sb 4 . Therefore, it is possible to reduce the variation in the discharge characteristics of the ink droplets of the ink Ia discharged from the second nozzle row La 1  communicating with the second introduction port Rin 2  and the ink droplets of the ink Ib discharged from the fourth nozzle row Lb 2  communicating with the fourth introduction port Rin 4 , and to improve the print quality. 
     The first outlet Fa 1 _out and the third outlet Fb 1 _out are arranged side by side in the +X direction, and the first introduction port Rin 1  and the second introduction port Rin 2  are arranged side by side in the +Y direction. In a plan view when viewed in the +Z direction, the center position between the first outlet Fa 1 _out and the third outlet Fb 1 _out and the center position between the first introduction port Rin 1  and the third introduction port Rin 3  substantially match each other. Here, the fact that the center position between the first outlet Fa 1 _out and the third outlet Fb 1 _out and the center position between the first introduction port Rin 1  and the third introduction port Rin 3  substantially match each other means that a virtual outlet V_out disposed at the center of the first outlet Fa 1 _out and the third outlet Fb 1 _out when viewed in the +Z direction and a virtual introduction port V_in disposed at the center of the first introduction port Rin 1  and the third introduction port Rin 3  at least partially overlap each other. 
     The virtual outlet V_out has the center disposed at the center of the line segment Ls 1  that connects the first outlet Fa 1 _out and the third outlet Fb 1 _out to each other. The size of the virtual outlet V_out is the same as the larger opening of the first outlet Fa 1 _out and the third outlet Fb 1 _out. 
     The virtual introduction port V_in has the center disposed at the center of the line segment Ls 2  that connects the first introduction port Rin 1  and the third introduction port Rin 3  to each other. The size of the virtual introduction port V_in is the same as the larger opening of the first introduction port Rin 1  and the third introduction port Rin 3 . 
     The fact that the center position between the first outlet Fa 1 _out and the third outlet Fb 1 _out and the center position between the first introduction port Rin 1  and the third introduction port Rin 3  substantially match each other means that at least a part of the virtual outlet V_out and a part of the virtual introduction port V_in overlap each other when viewed in the +Z direction. In this manner, by making the center position between the first outlet Fa 1 _out and the third outlet Fb 1 _out and the center position between the first introduction port Rin 1  and the third introduction port Rin 3  substantially match each other, it is possible to reduce the variation in the flow path length between the first outflow flow path Sa 3  on the downstream of the first filter chamber Fa 1  and the third outflow flow path Sb 3  on the downstream of the third filter chamber Fb 1 , and to reduce the variation in the pressure loss between the first outflow flow path Sa 3  and the third outflow flow path Sb 3 . Therefore, it is possible to reduce the variation in the discharge characteristics of the ink droplets of the ink Ia discharged from the first nozzle row La 1  communicating with the first introduction port Rin 1  and the discharge characteristics of the ink droplets of the ink Ib discharged from the third nozzle row Lb 1  communicating with the third introduction port Rin 3 , and to improve the print quality. 
     It is more preferable that the virtual outlet V_out and the virtual introduction port V_in completely overlap each other when viewed in the +Z direction. Incidentally, the fact that the virtual outlet V_out and the virtual introduction port V_in completely overlap each other when viewed in the +Z direction means that, when one of the virtual outlet V_out and the virtual introduction port V_in has a larger opening area compared to that of the other one, the other opening completely overlaps one opening. It is more preferable that the center of the virtual outlet V_out and the center of the virtual introduction port V_in are disposed at the same position when viewed in the +Z direction. Accordingly, it is possible to further reduce the variation in the flow path length between the first outflow flow path Sa 3  and the third outflow flow path Sb 3 , and to reduce the variation in the pressure loss between the first outflow flow path Sa 3  and the third outflow flow path Sb 3 . 
     In the present embodiment, as described above, the first filter chamber Fa 1  and the third filter chamber Fb 1  are disposed to be adjacent to each other in the +X direction, and has a shape elongated in the +Y direction when viewed in the +Z direction. Therefore, the first outlet Fa 1 _out and the third outlet Fb 1 _out can be disposed close to each other depending on the shape and arrangement of the first filter chamber Fa 1  and the third filter chamber Fb 1 . Therefore, it is possible to shorten the flow path length between the first outflow flow path Sa 3 , which is the flow path from the first outlet Fa 1 _out to the first introduction port Rin 1 , and the third outflow flow path Sb 3 , which is the flow path from the third outlet Fb 1 _out to the third introduction port Rin 3 , and to reduce the variation in the pressure loss between the first outflow flow path Sa 3  and the third outflow flow path Sb 3 . 
     The second outlet Fa 2 _out and the fourth outlet Fb 2 _out, and the second introduction port Rin 2  and the fourth introduction port Rin 4  also have the same relationship as that between the first outlet Fa 1 _out and the third outlet Fb 1 _out, and between the first introduction port Rin 1  and the fourth introduction port Rin 4 . In other words, as illustrated in  FIG.  16   , the second outlet Fa 2 _out and the fourth outlet Fb 2 _out are arranged side by side in the +X direction, and the second introduction port Rin 2  and the fourth introduction port Rin 4  are arranged side by side in the +Y direction. In a plan view when viewed in the +Z direction, the center position between the second outlet Fa 2 _out and the fourth outlet Fb 2 _out and the center position between the second introduction port Rin 2  and the fourth introduction port Rin 4  substantially match each other. The fact that the center position between the second outlet Fa 2 _out and the fourth outlet Fb 2 _out and the center position between the second introduction port Rin 2  and the fourth introduction port Rin 4  substantially match each other means the same relationship as that between the center position between the first outlet Fa 1 _out and the third outlet Fb 1 _out and the center position between the first introduction port Rin 1  and the third introduction port Rin 3 , and thus, duplicate description thereof will be omitted. In this manner, by making the center position between the second outlet Fa 2 _out and the fourth outlet Fb 2 _out and the center position between the second introduction port Rin 2  and the fourth introduction port Rin 4  substantially match each other, it is possible to reduce the variation in the flow path length between the second outflow flow path Sa 4  on the downstream of the second filter chamber Fa 2  and the fourth outflow flow path Sb 4  on the downstream of the fourth filter chamber Fb 2 , and to reduce the variation in the pressure loss between the second outflow flow path Sa 4  and the fourth outflow flow path Sb 4 . Therefore, it is possible to reduce the variation in the discharge characteristics of the ink droplets of the ink Ia discharged from the second nozzle row La 2  communicating with the second introduction port Rin 2  and the discharge characteristics of the ink droplets of the ink Ib discharged from the fourth nozzle row Lb 2  communicating with the fourth introduction port Rin 4 , and to improve the print quality. 
     In the present embodiment, the first outlet Fa 1 _out, the third outlet Fb 1 _out, the first introduction port Rin 1 , and the third introduction port Rin 3 , the second outlet Fa 2 _out, the fourth outlet Fb 2 _out, the second introduction port Rin 2 , and the fourth introduction port Rin 4  are disposed to be substantially point-symmetrical to each other. Therefore, it is possible to suppress the variation in the flow path length between the first outflow flow path Sa 3  and the third outflow flow path Sb 3 , and the second outflow flow path Sa 4  and the fourth outflow flow path Sb 4 , and to reduce the variation in pressure loss. Therefore, by reducing the variation in the pressure loss between the second outflow flow path Sa 4  and the fourth outflow flow path Sb 4 , it is possible to improve the print quality by aligning the discharge characteristics of the ink droplets discharged from the first nozzle row La 1 , the third nozzle row Lb 1 , the second nozzle row La 2 , and the fourth nozzle row Lb 2 . 
     The flow path member  60  of the present embodiment is further provided with the first discharge path Da and the second discharge path Db. 
     As illustrated in  FIGS.  12 ,  13 ,  18 , and  19   , the first discharge path Da includes two first discharge penetration sections Da 1 , a first discharge branch section Da 2 , and the first discharge section Da 3  from the upstream to the downstream. 
     The first discharge penetration section Da 1  is provided so as to penetrate the fourth flow path substrate  84  over the Z-axis such that one end is open on the surface of the fifth flow path substrate  85  on the +Z direction side. In the present embodiment, two first discharge penetration sections Da 1  are provided. In other words, the two first discharge penetration sections Da 1  are provided at a position that communicates with the communication path  34  of the holder  30  corresponding to each of one discharge port Rout of the first head chip  44 A and one discharge port Rout of the second head chip  44 B. 
     The first discharge branch section Da 2  is provided at the interface where the fourth flow path substrate  84  and the fifth flow path substrate  85  are fixed to each other, and extends along the in-plane direction of the XY plane. The first discharge branch section Da 2  communicates with the other end of the first discharge penetration section Da 1 , which is open on the surface on the −Z direction side of the fourth flow path substrate  84  at both ends. 
     The first discharge section Da 3  is for discharging ink from the inside of the flow path member  60  to the outside, and is provided so as to penetrate the first flow path substrate  81 , the second flow path substrate  82 , the third flow path substrate  83 , and the fourth flow path substrate  84  over the Z-axis from the inside of the discharge pipe PAout protruding in the −Z direction of the first flow path substrate  81 . One end of the first discharge section Da 3  is provided so as to communicate with the middle of the first discharge branch section Da 2 . In the present embodiment, the first discharge section Da 3  is provided so as to communicate with one end portion side of the first discharge branch section Da 2  in the +X direction. 
     In the first discharge path Da, the ink Ia discharged from the discharge ports Rout of each of the two head chips  44  merges at the first discharge branch section Da 2  via the communication path  34  of the holder  30  and the first discharge penetration section Da 1 , and returns to the liquid container  2 A via the first discharge section Da 3  and the discharge tube TAout. 
     The second discharge path Db includes a second discharge penetration section Db 1 , a second discharge branch section Db 2 , and the second discharge section Db 3  from the upstream to the downstream. 
     The second discharge penetration section Db 1  is provided so as to penetrate the fourth flow path substrate  84  and the fifth flow path substrate  85  over the Z-axis such that one end is open on the surface of the fourth flow path substrate  84  on the +Z direction side. In the present embodiment, two second discharge penetration sections Db 1  are provided. In other words, the two second discharge penetration sections Db 1  are provided at a position that communicates with the communication path  34  of the holder  30  corresponding to each of the other one discharge port Rout of the second head chip  44 B and the other discharge port Rout of the second head chip  44 B. 
     The second discharge branch section Db 2  is provided at the interface where the third flow path substrate  83  and the fourth flow path substrate  84  are fixed to each other, and extends along the in-plane direction of the XY plane. The second discharge branch section Db 2  communicates with the other end of the second discharge penetration section Db 1 , which is open on the surface on the −Z direction side of the third flow path substrate  83  at both ends. 
     The second discharge section Db 3  is for discharging ink from the inside of the flow path member  60  to the outside, and is provided so as to penetrate the first flow path substrate  81 , the second flow path substrate  82 , and the third flow path substrate  83  over the Z-axis from the inside of the discharge pipe PBout protruding in the −Z direction of the first flow path substrate  71 . One end of the second discharge section Db 3  is provided so as to communicate with the middle of the second discharge branch section Db 2 . In the present embodiment, the second discharge section Db 3  is provided so as to communicate with one end portion side of the second discharge branch section Db 2  in the +X direction. 
     In the second discharge path Db, the ink Ib discharged from the discharge ports Rout of each of the two head chips  44  merges at the second discharge branch section Db 2  via the communication path  34  of the holder  30  and the second discharge penetration section Db 1 , and returns to the liquid container  2 B via the second discharge section Db 3  and the discharge tube TBout. 
     In the recording head  10  having the above-described configuration, ink is supplied from the liquid container  2  to the head chip  44  via the flow path member  60 , the print signal or the like is transmitted from the control unit  3  to the head chip  44  via the relay substrate  73  or the like, the piezoelectric actuator  484  in the head chip  44  is driven based on the print signal or the like, and accordingly, ink droplets are ejected from the nozzle N. 
     As described above, the ink jet type recording head  10  which is the liquid ejecting head according to the present embodiment includes: the first nozzle row La 1  extending in the +X direction, which is the first direction; the second nozzle row La 2  extending in the +X direction; the first supply flow path Sa 2  for supplying ink to the first nozzle row La 1  and the second nozzle row La 2 ; the first filter chamber Fa, which has the first inlet Fa 1 _in through which the ink flows in from the first supply flow path Sa 2 , and in which the ink supplied from the first supply flow path Sa 2  to the first nozzle row flows; and the second filter chamber Fb, which has the second inlet Fa 2 _in through which the ink flows in from the first supply flow path Sa 2 , and in which the ink supplied from the first supply flow path Sa 2  to the second nozzle row La 2  flows, the first nozzle row La 1  and the second nozzle row La 2  are disposed to be offset from each other in both the +X direction and the +Y direction orthogonal to the +X direction, the first nozzle row La 1  ejects the liquid in the +Z direction, which is the third direction, orthogonal to the +X direction and the +Y direction, the first supply flow path Sa 2  has the first branch section Sa 25 , which is the branch flow path, for distributing the ink between the first filter chamber Fa 1  and the second filter chamber Fa 2  at the first branch position Sc 1 , which is the branch position, the first branch position Sc 1  is disposed between the first filter chamber Fa 1  and the second filter chamber Fa 2  in a plan view when viewed in the +Z direction, the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed so as to at least partially overlap each other when viewed in the +Y direction, and the first inlet Fa 1 _in and the second inlet Fa 2 _in are disposed at a part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other when viewed in the +Y direction. 
     In this manner, even when the first nozzle row La 1  and the second nozzle row La 2  are disposed so as to be offset from each other in both the +X direction and the +Y direction, the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed so as to at least partially overlap each other when viewed in the +Y direction, and accordingly, it is possible to dispose the first branch position Sc 1  immediately before the first filter chamber Fa 1  and the second filter chamber Fa 2 . Therefore, it is possible to shorten the flow path length of the first branch section Sa 25 , to suppress the variation in the flow path length from the first branch position Sc 1  to the first filter chamber Fa 1  and the flow path length from the first branch position Sc 1  to the second filter chamber Fa 2 , and to suppress the variation in the pressure loss due to the variation in the flow path length. Accordingly, it is possible to reduce the variation in the discharge characteristics of the ink droplets discharged from the first nozzle row La 1  and the second nozzle row La 2 , and to improve the print quality. Therefore, since it is possible to shorten the flow path length of the first branch section Sa 25 , it is possible to elongate the flow path length of the common part before the first branch position Sc 1  of the first supply flow path Sa 2 , and to simplify the layout of the first supply flow path Sa 2 . 
     In the recording head  10  of the present embodiment, it is preferable that the first inlet Fa 1 _in is disposed on the surface of the first filter chamber Fa 1  facing the second filter chamber Fa 2 , and the second inlet Fa 2 _in is disposed on the surface of the second filter chamber Fa 2  facing the first filter chamber Fa 1 . In this manner, by disposing the first inlet Fa 1 _in on the surface of the first filter chamber Fa 1  facing the second filter chamber Fa 2 , and by disposing the second inlet Fa 2 _in on the surface of the second filter chamber Fa 2  facing the first filter chamber Fa 1 , the first branch position Sc 1  can be disposed immediately before the first filter chamber Fa 1  and the second filter chamber Fa 2 . 
     In the recording head  10  of the present embodiment, it is preferable that the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed to be offset from each other in the +X direction, which is the first direction, so as to partially overlap each other when viewed in the +Y direction, which is the second direction. In this manner, as the first filter chamber Fa 1  and the second filter chamber Fa 2  are disposed to be offset from each other in the +X direction so as to partially overlap each other when viewed in the +Y direction, in the recording head  10  in which the nozzle rows are disposed to be offset from each other, even when the two introduction ports Rin are offset from each other in the +X direction, the distance between the first filter chamber Fa 1  and the introduction port Rin and the distance between the second filter chamber Fa 2  and the introduction port Rin can be shortened. Therefore, it is possible to reduce the variation in the pressure loss of the ink supplied to the two introduction ports Rin. 
     In the recording head  10  of the present embodiment, it is preferable that the width W 5  in the +X direction, which is the first direction, of the part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other when viewed in the +Y direction, which is the second direction, is smaller than half the width W 6  of the first filter chamber Fa 1  in the +X direction. In this manner, by setting the width W 5  where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other to be smaller than half the width W 6  of the first filter chamber Fa 1 , even when the first inlet Fa 1 _in is disposed at the end portion of the first filter chamber Fa 1 , and even when the second inlet Fa 2 _in is disposed at the end portion of the second filter chamber Fa 2 , it is possible to make the first filter chamber Fa 1  and the second filter chamber Fa 2  easily get closer to each other in the +Y direction. By bringing the first filter chamber Fa 1  and the second filter chamber Fa 2  closer to each other in the +Y direction, the size of the recording head  10  can be reduced in the +Y direction. By bringing the first filter chamber Fa 1  and the second filter chamber Fa 2  closer to each other in the +Y direction, the head chips  44  arranged side by side in the +Y direction can get closer to each other in the +Y direction, and it is possible to reduce the difference in the discharge timing of ink droplets discharged from different head chips  44 . Therefore, it is possible to suppress the deviation of the landing position of the ink droplet on the medium S. 
     In the recording head  10  of the present embodiment, it is preferable that each of the widths W 7  and W 8  of the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +X direction, which is the first direction, are smaller than the width W 5  in the +X direction of the part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other when viewed in the +Y direction, which is the second direction. In this manner, by setting the width W 7  of the first inlet Fa 1 _in and the width W 8  of the second inlet Fa 2 _in to be smaller than the width W 5  in the +X direction, which is the first direction, of the part where the first filter chamber Fa 1  and the second filter chamber Fa 2  overlap each other when viewed in the +Y direction, which is the second direction, it is possible to increase the flow velocity of the ink flowing into the first filter chamber Fa 1  and the second filter chamber Fa 2 , and to discharge the air bubbles contained in the ink in the first filter chamber Fa 1  and the second filter chamber Fa 2  to the downstream, that is, to improve the so-called air bubble discharge properties. 
     In the recording head  10  of the present embodiment, it is preferable that the inner wall Sa 25   a , which is a part, of the first branch section Sa 25 , which is the branch flow path, and the inner wall Fa 1   a , which is a part, of the inner wall of the first filter chamber Fa 1  are continuous along the +Y direction, which is the second direction, in the plan view when viewed in the +Z direction, and the inner wall Sa 25   b  of the first branch section Sa 25  and the inner wall Fa 2   a , which is a part, of the inner wall of the second filter chamber Fa 2  are continuous along the +Y direction in a plan view when viewed in the +Z direction. By continuously providing the inner wall Sa 25   a  of the first branch section Sa 25  and the inner wall Fa 1   a  of the first filter chamber Fa 1  along the +Y direction, the ink from the first branch section Sa 25  flows into the first filter chamber Fa 1  from the first inlet Fa 1 _in along the inner walls Sa 25   a  and Fa 1   a . Therefore, it is possible to suppress a decrease in the flow velocity of the ink when flowing into the first filter chamber Fa 1 , and to improve the discharge properties of air bubbles contained in the ink in the first filter chamber Fa 1 , so-called air bubble discharge properties. Similarly, by continuously providing the inner wall Sa 25   b  of the first branch section Sa 25  and the inner wall Fa 2   a  of the second filter chamber Fa 2  along the +Y direction, the ink from the first branch section Sa 25  flows into the second filter chamber Fa 2  from the second inlet Fa 2 _in along the inner walls Sa 25   b  and Fa 2   a . Therefore, it is possible to suppress a decrease in the flow velocity of the ink when flowing into the second filter chamber Fa 2 , and to improve the discharge properties of air bubbles contained in the ink in the second filter chamber Fa 2 , so-called air bubble discharge properties. 
     In the recording head  10  of the present embodiment, it is preferable that the first throttle section Sa 25   c , which is a part, of which the width Wa 1  in the +X direction is smaller than the width W 7  of the first inlet Fa 1 _in in the +X direction, which is the first direction, is provided between the first branch section Sc 1 , which is the branch position, and the first inlet Fa 1 _in in the first branch section Sa 25 , which is the branch flow path. In this manner, by providing the first throttle section Sa 25   c  in the first branch section Sa 25 , it is possible to increase the flow velocity of the ink that flows into the first filter chamber Fa 1  from the first branch section Sa 25 , and to improve the discharge properties of the air bubbles contained in the ink in the first filter chamber Fa 1 . 
     In the recording head  10  of the present embodiment, it is preferable that the first branch section Sc 25 , which is the branch flow path, the first inlet Fa 1 _in, and the second inlet Fa 2 _in are disposed at the same position in the +Z direction, which is the third direction. In this manner, by providing the first branch section Sa 25  at the same position as the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction, it is possible to dispose the first branch position Sc 1  at the same position in the +Z direction as the first inlet Fa 1 _in and the second inlet Fa 2 _in. By disposing the first branch position Sc 1  at the same position in the +Z direction as the first inlet Fa 1 _in and the second inlet Fa 2 _in, it is possible to dispose the first branch position Sc 1  immediately before the first filter chamber Fa 1  and the second filter chamber Fa 2  as compared with the configuration in which the first branch position Sc 1  is disposed at the upper part on the Z-axis of the first filter chamber group Fa, that is, in the −Z direction, or at the lower part, that is, in the +Z direction. Therefore, it is possible to elongate the flow path length of the common part before the first branch position Sc 1  of the first supply path Sa, and to simplify the layout of the first supply path Sa. 
     In the recording head  10  of the present embodiment, it is preferable that the first filter chamber Fa 1  has the first outlet Fa 1 _out through which the ink, which is the liquid, flows out, the second filter chamber Fa 2  has the second outlet Fa 2 _out through which the ink flows out, the first outlet Fa 1 _out is disposed at a part that does not overlap the second filter chamber Fa 2  when viewed in the +Y direction, which is the second direction, to be far from the second filter chamber Fa 2  with respect to the center Fa 1   c  of the first filter chamber Fa 1  in the +Y direction, and the second outlet Fa 2 _out is disposed at a part that does not overlap the first filter chamber Fa 1  when viewed in the +Y direction to be far from the first filter chamber Fa 1  with respect to the center Fa 2   c  of the second filter chamber Fa 2  in the +Y direction. By disposing the first outlet Fa 1 _out in this manner, it is possible to dispose the straight line that connects the first inlet Fa 1 _in and the first outlet Fa 1 _out to each other at a position away from the diagonal line of the first filter chamber Fa 1 , and it is possible to suppress occurrence of stagnation of ink in the first filter chamber Fa 1 . Similarly, by disposing the second outlet Fa 2 _out as described above, it is possible to dispose the straight line that connects the second inlet Fa 2 _in and the second outlet Fa 2 _out to each other at a position away from the diagonal line of the second filter chamber Fa 2 , and it is possible to suppress occurrence of stagnation of ink in the second filter chamber Fa 2 . 
     In the recording head  10  of the present embodiment, the third nozzle row Lb 1  extending in the +X direction, which is the first direction; the fourth nozzle row Lb 2  extending in the +X direction; the second supply flow path Sb 2  for supplying ink, which is the liquid, to the third nozzle row Lb 1  and the fourth nozzle row Lb 2 ; the third filter chamber Fb 1 , which has the third inlet Fb 1 _in through which the ink flows in from the second supply flow path Sb 2 , and in which the ink supplied from the second supply flow path Sb 2  to the third nozzle row Lb 1  flows; and the fourth filter chamber Fb 2 , which has the fourth inlet Fb 2 _in through which the ink flows in from the second supply flow path Sb 2 , and in which the ink supplied from the second supply flow path Sb 2  to the fourth nozzle row Lb 2  flows, are provided, the third filter chamber Fb 1  and the first filter chamber Fa 1  are disposed to be adjacent to each other in the +X direction, the fourth filter chamber Fb 2  and the second filter chamber Fa 2  are disposed to be adjacent to each other in the +X direction, the third filter chamber Fb 1  and the fourth filter chamber Fb 2  are disposed to be offset from each other in the +X direction so as to partially overlap each other when viewed in the +Y direction, which is the second direction, and a part of the first filter chamber Fa 1  and a part of the fourth filter chamber Fb 2  overlap each other when viewed in the +Y direction, or a part of the second filter chamber Fa 2  and a part of the third filter chamber Fb 1  overlap each other when viewed in the +Y direction. In the present embodiment, the second filter chamber Fa 2  and the third filter chamber Fb 1  are disposed so as to partially overlap each other when viewed in the +Y direction, which is the second direction. In this manner, by disposing the second filter chamber Fa 2  and the third filter chamber Fb 1  so as to partially overlap each other when viewed in the +Y direction, the first filter chamber group Fa and the second filter chamber group Fb can be disposed close to each other in the +X direction. Therefore, the size of the recording head  10  can be reduced in the +X direction. 
     In the recording head  10  of the present embodiment, it is preferable that the first nozzle row La 1  and the second nozzle row La 2  are disposed so as to partially overlap each other when viewed in the +Y direction, which is the second direction. By disposing the first nozzle row La 1  and the second nozzle row La 2  so as to partially overlap each other when viewed in the +Y direction, which is the second direction, the continuous rows of the nozzles N along the +X direction can be formed by the first nozzle row La 1  and the second nozzle row La 2 . 
     The ink jet type recording apparatus  1 , which is the liquid ejecting apparatus of the present embodiment, includes: the above-described recording head  10 ; and the transport mechanism  4 , which is the transport section, that transports the medium S. In the ink jet type recording apparatus  1 , it is possible to reduce the variation in the discharge characteristics of the ink discharged from the recording head  10 , and to improve the print quality. 
     Other Embodiments 
     Although one embodiment of the present disclosure was described above, the basic configuration of the present disclosure is not limited to the above-described one. 
     For example, in the present embodiment 1 described above, the configuration in which the second filter chamber Fa 2  is disposed at a position offset from the first filter chamber Fa 1  in the +X direction is illustrated, but the present disclosure is not particularly limited thereto, and the second filter chamber Fa 2  may be disposed at a position offset from the first filter chamber Fa 1  in the −X direction. Similarly, regarding the third filter chamber Fb 1  and the fourth filter chamber Fb 2 , the fourth filter chamber Fb 2  may also be disposed at a position offset from the third filter chamber Fb 1  in the + and −X directions. 
     In Embodiment 1 described above, the ink Ia and the ink Ib having different colors are supplied to the first supply path Sa and the second supply path Sb, but the present disclosure is not particularly limited thereto, and the ink having the same color may be supplied to the first supply path Sa and the second supply path Sb. 
     In Embodiment 1 described above, the configuration in which the first nozzle row La 1  and the second nozzle row La 1  are disposed so as to partially overlap each other when viewed in the +Y direction is illustrated, but the present disclosure is not particularly limited thereto, and the first nozzle row La 1  and the second nozzle row La 1  may be disposed so as not to overlap each other when viewed in the +Y direction. The same applies to the third nozzle row Lb 1  and the fourth nozzle row Lb 2 . 
     In Embodiment 1 described above, the first filter chamber Fa 1  and the second filter chamber Fa 2  that form the first filter chamber group Fa are disposed to be offset from each other in the +X direction so as to partially overlap each other when viewed in the +Y direction, but the present disclosure is not particularly limited thereto. Here, a modification example of the first filter chamber group Fa is illustrated in  FIGS.  20  and  21   .  FIGS.  20  and  21    are plan views illustrating a modification example of the first filter chamber group Fa. 
     As illustrated in  FIGS.  20  and  21   , the first filter chamber Fa 1  and the second filter chamber Fa 2  that form the first filter chamber group Fa are disposed at the same position in the +X direction so as to completely overlap each other when viewed in the +Y direction. 
     As illustrated in  FIG.  20   , the first inlet Fa 1 _in through which ink flows into the first filter chamber Fa 1  and the second inlet Fa 2 _in through which ink flows into the second filter chamber Fa 2  may be provided on the same side on the X-axis of the first filter chamber Fa 1  and the second filter chamber Fa 2 , and at the end portion in the −X direction in the present embodiment. 
     It is preferable that the first outlet Fa 1 _out is disposed at the end portion in the +X direction opposite to the first inlet Fa 1 _in on the X-axis, and is disposed in the region S 3  on the −Y direction side of the center Fa 1   c  of the first filter chamber Fa 1  in the +Y direction. Accordingly, it is possible to dispose the first inlet Fa 1 _in and the first outlet Fa 1 _out in the vicinity of the position away from the diagonal line of the first filter chamber Fa 1 , and to suppress occurrence of stagnation of ink in the first filter chamber Fa 1 . 
     It is preferable that the second outlet Fa 2 _out is disposed at the end portion in the +X direction opposite to the second inlet Fa 2 _in on the X-axis, and is disposed in the region S 4  on the +Y direction side of the center Fa 2   c  of the second filter chamber Fa 2  in the +Y direction. Accordingly, it is possible to dispose the second inlet Fa 2 _in and the second outlet Fa 2 _out in the vicinity of the position away from the diagonal line of the second filter chamber Fa 2 , and to suppress occurrence of stagnation of ink in the second filter chamber Fa 2 . 
     The first inlet Fa 1 _in and the first outlet Fa 1 _out may not be disposed on the diagonal line of the first filter chamber Fa 1  and in the vicinity thereof. In other words, as illustrated in  FIG.  21   , the first inlet Fa 1 _in and the first outlet Fa 1 _out may be disposed in the center portion in the +X direction of the first filter chamber Fa 1 . It is preferable that the first outlet Fa 1 _out is disposed in the region S 3  on the −Y direction side of the center Fa 1   c  of the first filter chamber Fa 1  in the +Y direction. It is preferable that the second outlet Fa 2 _out is disposed in the region S 4  on the +Y direction side of the center Fa 2   c  of the second filter chamber Fa 2  in the +Y direction. In this manner, when the first inlet Fa 1 _in, the first outlet Fa 1 _out, the second inlet Fa 2 _in, and the second outlet Fa 2 _out are disposed in the center portion of the first filter chamber Fa 1  and the second filter chamber Fa 2  in the +X direction, the stagnation of ink is likely to occur in the first filter chamber Fa 1  and the second filter chamber Fa 2  compared to Embodiment 1 described above and  FIG.  20   . Accordingly, as illustrated in Embodiment 1 described above and  FIG.  20   , it is preferable that the first inlet Fa 1 _in and the first outlet Fa 1 _out are disposed on the diagonal line of the first filter chamber Fa 1  and in the vicinity thereof. Similarly, it is preferable that the second inlet Fa 2 _in and the second outlet Fa 2 _out are disposed on the diagonal line of the second filter chamber Fa 2  and in the vicinity thereof. 
     The second filter chamber group Fb can also have the same configuration as those in  FIGS.  20  and  21   . 
     In Embodiment 1 described above, the first branch section Sa 25 , the first inlet Fa 1 _in, and the second inlet Fa 2 _in are disposed at the same position in the +Z direction, and the present disclosure is not particularly limited thereto. Here, a modification example of the first supply path Sa is illustrated in  FIG.  22   .  FIG.  22    is a perspective view illustrating a part of the first supply path Sa. 
     The first branch section Sa 25  includes a pair of first flow path sections Sa 251  coupled to the first inlet Fa 1 _in and the second inlet Fa 2 _in, a pair of second flow path sections Sa 252  coupled to the pair of first flow path section Sa 251 , and a third flow path section Sa 253  that couples the pair of second flow path sections Sa 252  and the first coupling section Sa 24  to each other. 
     The pair of first flow path sections Sa 251  are provided at the same position in the +Z direction as the first inlet Fa 1 _in and the second inlet Fa 2 _in, and one end thereof communicates with the first inlet Fa 1 _in and the second inlet Fa 2 _in, respectively. The pair of first flow path sections Sa 251  are provided along the X-axis. 
     The pair of second flow path sections Sa 252  are parts provided along the Z-axis, and one second flow path section Sa 252  couples the other end of one first flow path section Sa 251  and one end of the third flow path section Sa 253  to each other. The other second flow path section Sa 252  is coupled to the other end of the other first flow path section Sa 251  and the other end of the third flow path section Sa 253  to each other. 
     The third flow path section Sa 253  is disposed at a position different from that of the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction, and in the present embodiment, on the −Z direction side of the first inlet Fa 1 _in and the second inlet Fa 2 _in. The first coupling section Sa 24  is coupled to the middle of the third flow path section Sa 253 . In other words, the first branch position Sc 1  is disposed at a position different from that of the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction. 
     In such a configuration, similar to Embodiment 1 described above, the first branch position Sc 1  is disposed between the first filter chamber Fa 1  and the second filter chamber Fa 2  in a plan view when viewed in the +Z direction. Therefore, as illustrated in  FIG.  22   , even when a part of the first branch section Sa 25  is disposed at a position different from those of the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction, by disposing the first branch position Sc 1  in the region S 1  between the first filter chamber Fa 1  and the second filter chamber Fa 2 , it is possible to relatively shorten the flow path length of the first branch section Sa 25  compared to a case where the first branch position Sc 1  is disposed in a region other than the region S 1 . Similar to Embodiment 1 described above, it is needless to say that the flow path length of the first branch section Sa 25  can be shortened when the first branch section Sa 25  is disposed at the same position as the first inlet Fa 1 _in and the second inlet Fa 2 _in in the +Z direction, and it is possible to suppress the variation in the pressure loss. 
     In Embodiment 1 described above, the recording head  10  having two supply paths of the first supply path Sa and the second supply path Sb was illustrated, but the present disclosure is not particularly limited thereto, and the recording head  10  having three or more supply paths may be employed. Assuming that the three supply paths are the first supply path, the second supply path, and the third supply path, and the introduction section and the filter chamber group of each supply path are provided, while the introduction section and the filter chamber group of the first supply path are referred to as “first introduction section” and “first filter chamber group” described in the range of the claims, and the introduction section and the filter chamber group of the second supply path are referred to as “second introduction section” and “second filter chamber group” described in the range of the claims, the configuration described in the range of the claims may be employed. While the introduction section and the filter chamber group of the second supply path are referred to as “first introduction section” and “first filter chamber group” described in the range of the claims, and the introduction section and the filter chamber group of the third supply path are referred to as “second introduction section” and “second filter chamber group” described in the range of the claims, the configuration described in the range of the claims may also be employed to the second supply path and the third supply path. Even when there are four or more supply paths, it is needless to say that the same configuration as described above can be employed. Accordingly, even in a plurality of three or more supply paths, it is possible to reduce the variation in the flow path length, to reduce the variation in the pressure loss, and to suppress the variation in the discharge characteristics of the ink droplets.