A liquid ejecting head (21, 21A, 21B, 21C, 21D; 356 A, 356B) comprising: a head module (170, 200) that includes an ejecting element ejecting a liquid; a head module supporting member (110, 160) that when mounted into a printer, supports the head module (170, 200) with a head module supporting surface facing the opposite direction to the gravity direction or a head module supporting surface facing an obliquely upward direction having a component of the opposite direction to the gravity direction, and has a structure in which a longitudinal direction of the head module supporting member (110, 160) is a first direction; and a deflection suppressing unit (112; 112B, 112C, 112D; 357; 357C, 357M, 357Y, 357K; 512; 512A, 512B) that has a structure in which a longitudinal direction of the deflection suppressing unit is the first direction, and is disposed on a top surface (110B, 114E, 157B, 160B, 514A) of the head module supporting member (110, 160), which is a surface opposite to the head module supporting surface, wherein the deflection suppressing unit comprises a deflection absorption unit (114; 114B; 154; 514, 514B) that is an elastic body of which a longitudinal direction is a direction parallel to the first direction or a direction obliquely intersecting the first direction, and has both end portions in the longitudinal direction that are connected to both end portions of the top surface (110B, 114E, 157B, 160B, 514A) of the head module supporting member (110, 160) in the first direction, a head module supporting member connection unit (116, 156A, 156B) of which one end is connected to an intermediate position between the both end portions of the deflection absorption unit in the first direction and the other end is connected to the top surface of the head module supporting member (110, 160), and a biasing force applying unit (130, 140) that applies a biasing force, which is a force that deflects the deflection absorption unit (114, 114B, 154, 514) in a deflection direction of the head module supporting member (110, 160), to the deflection absorption unit. a head module (170, 200) that includes an ejecting element ejecting a liquid; a head module supporting member (110, 160) that when mounted into a printer, supports the head module (170, 200) with a head module supporting surface facing the opposite direction to the gravity direction or a head module supporting surface facing an obliquely upward direction having a component of the opposite direction to the gravity direction, and has a structure in which a longitudinal direction of the head module supporting member (110, 160) is a first direction; and a deflection suppressing unit (112; 112B, 112C, 112D; 357; 357C, 357M, 357Y, 357K; 512; 512A, 512B) that has a structure in which a longitudinal direction of the deflection suppressing unit is the first direction, and is disposed on a top surface (110B, 114E, 157B, 160B, 514A) of the head module supporting member (110, 160), which is a surface opposite to the head module supporting surface, wherein the deflection suppressing unit comprises a deflection absorption unit (114; 114B; 154; 514, 514B) that is an elastic body of which a longitudinal direction is a direction parallel to the first direction or a direction obliquely intersecting the first direction, and has both end portions in the longitudinal direction that are connected to both end portions of the top surface (110B, 114E, 157B, 160B, 514A) of the head module supporting member (110, 160) in the first direction, a head module supporting member connection unit (116, 156A, 156B) of which one end is connected to an intermediate position between the both end portions of the deflection absorption unit in the first direction and the other end is connected to the top surface of the head module supporting member (110, 160), and a biasing force applying unit (130, 140) that applies a biasing force, which is a force that deflects the deflection absorption unit (114, 114B, 154, 514) in a deflection direction of the head module supporting member (110, 160), to the deflection absorption unit. a deflection absorption unit (114; 114B; 154; 514, 514B) that is an elastic body of which a longitudinal direction is a direction parallel to the first direction or a direction obliquely intersecting the first direction, and has both end portions in the longitudinal direction that are connected to both end portions of the top surface (110B, 114E, 157B, 160B, 514A) of the head module supporting member (110, 160) in the first direction, a head module supporting member connection unit (116, 156A, 156B) of which one end is connected to an intermediate position between the both end portions of the deflection absorption unit in the first direction and the other end is connected to the top surface of the head module supporting member (110, 160), and a biasing force applying unit (130, 140) that applies a biasing force, which is a force that deflects the deflection absorption unit (114, 114B, 154, 514) in a deflection direction of the head module supporting member (110, 160), to the deflection absorption unit.