A droplet-discharging head that is constituted of a plurality of head modules each having a nozzle surface on which a plurality of nozzles is arranged, the droplet-discharging head comprising: a base frame that has the head modules mounted thereon; a head module support unit (276,278) that individually supports the head modules, the head module support unit provided on the base frame; a mounting position adjustment unit (248,250,296) that individually adjusts mounting positions of the head modules supported by the head module support unit; and a displacement detection unit (260,298) that individually detects amounts of displacement of the head modules when the mounting positions of the head modules is adjusted by the mounting position adjustment unit, the mounting position adjustment unit has X-directional mounting position adjustment unit that adjusts the mounting positions in an X direction parallel to an arrangement direction of the nozzles, the displacement detection unit detects the amounts of displacement of the head modules in the X direction, characterized in that the base frame has three Y-directional base frame positioning members (290, 292) that serve as a reference for positioning the base frame in a Y direction orthogonal to the arrangement direction of the nozzles, and two Z-directional base frame positioning members that serve as a reference for positioning the base frame in a Z direction orthogonal to the nozzle surfaces, wherein the head module has three Y-directional head module positioning members (234, 236) that are brought into direct contact with the Y-directional base frame positioning members (290,292), and two Z-directional head module positioning members that are brought into direct contact with the Z-directional base frame positioning members, and wherein the head module support unit has Y-directional biasing unit that biases the head modules in the Y direction in engagement with the head modules and bringing the Y-directional head module positioning members (234, 236) into direct pressure contact with the Y-directional base frame positioning members (290,292), and Z-directional biasing unit that biases the head modules in the Z direction in engagement with the head modules and bringing the Z-directional head module positioning members into direct pressure contact with the Z-directional base frame positioning members. a base frame that has the head modules mounted thereon; a head module support unit (276,278) that individually supports the head modules, the head module support unit provided on the base frame; a mounting position adjustment unit (248,250,296) that individually adjusts mounting positions of the head modules supported by the head module support unit; and a displacement detection unit (260,298) that individually detects amounts of displacement of the head modules when the mounting positions of the head modules is adjusted by the mounting position adjustment unit, the mounting position adjustment unit has X-directional mounting position adjustment unit that adjusts the mounting positions in an X direction parallel to an arrangement direction of the nozzles, the displacement detection unit detects the amounts of displacement of the head modules in the X direction, characterized in that the base frame has three Y-directional base frame positioning members (290, 292) that serve as a reference for positioning the base frame in a Y direction orthogonal to the arrangement direction of the nozzles, and two Z-directional base frame positioning members that serve as a reference for positioning the base frame in a Z direction orthogonal to the nozzle surfaces, wherein the head module has three Y-directional head module positioning members (234, 236) that are brought into direct contact with the Y-directional base frame positioning members (290,292), and two Z-directional head module positioning members that are brought into direct contact with the Z-directional base frame positioning members, and wherein the head module support unit has Y-directional biasing unit that biases the head modules in the Y direction in engagement with the head modules and bringing the Y-directional head module positioning members (234, 236) into direct pressure contact with the Y-directional base frame positioning members (290,292), and Z-directional biasing unit that biases the head modules in the Z direction in engagement with the head modules and bringing the Z-directional head module positioning members into direct pressure contact with the Z-directional base frame positioning members.