An ink jet head maintenance apparatus comprising: a suction member which includes a suction hole configured to suction ink and in which air in the suction hole is suctioned from one opening of the suction hole by a suction operation unit, and a supporting unit which supports the suction member with leg portions in between, wherein, the suction member includes a height adjustment surface which is adjacent to an opening surface in which the other opening of the suction hole is provided and in which an inner angle formed with the opening surface is an obtuse angle, the opening surface is able to move in a first direction including a normal direction of the opening surface in a predetermined initial state in which the suction member is not deformed and in which the leg portions which are able to expand and contract are not expanded or contracted in response to external force applied to the height adjustment surface, the first direction being equal to a height direction, the height direction being a direction that, in use, is orthogonal to a conveying surface, the height adjustment surface is provided in a position which comes into contact with a head unit when the maintenance apparatus is attached to an ink jet recording apparatus provided with a head unit including the ink jet head which is to be a target of suction of ink and when the suction member moves relatively in a predetermined second direction intersecting with the normal direction and the first direction in a relative motion with relation to the ink jet head from a predetermined standby position in which the suction member is separated from the head unit, and in which position the opening surface and the nozzle surface of the ink jet head are parallel, wherein the predetermined second direction is a direction parallel to the nozzle surface, and wherein the predetermined second direction is an arrangement width direction along a long side of a nozzle arrangement range in an ink discharge surface, and the suction member is configured to be moveable, as a result of the external force applied to the height adjustment surface from the head unit relatively moving in the predetermined second direction, in the first direction up to a position where the opening surface comes into contact with the ink jet head facing the nozzle surface of the ink jet head for suctioning ink from the nozzle surface and where the height adjustment surface does not come into contact with the head unit. a suction member which includes a suction hole configured to suction ink and in which air in the suction hole is suctioned from one opening of the suction hole by a suction operation unit, and a supporting unit which supports the suction member with leg portions in between, wherein, the suction member includes a height adjustment surface which is adjacent to an opening surface in which the other opening of the suction hole is provided and in which an inner angle formed with the opening surface is an obtuse angle, the opening surface is able to move in a first direction including a normal direction of the opening surface in a predetermined initial state in which the suction member is not deformed and in which the leg portions which are able to expand and contract are not expanded or contracted in response to external force applied to the height adjustment surface, the first direction being equal to a height direction, the height direction being a direction that, in use, is orthogonal to a conveying surface, the height adjustment surface is provided in a position which comes into contact with a head unit when the maintenance apparatus is attached to an ink jet recording apparatus provided with a head unit including the ink jet head which is to be a target of suction of ink and when the suction member moves relatively in a predetermined second direction intersecting with the normal direction and the first direction in a relative motion with relation to the ink jet head from a predetermined standby position in which the suction member is separated from the head unit, and in which position the opening surface and the nozzle surface of the ink jet head are parallel, wherein the predetermined second direction is a direction parallel to the nozzle surface, and wherein the predetermined second direction is an arrangement width direction along a long side of a nozzle arrangement range in an ink discharge surface, and the suction member is configured to be moveable, as a result of the external force applied to the height adjustment surface from the head unit relatively moving in the predetermined second direction, in the first direction up to a position where the opening surface comes into contact with the ink jet head facing the nozzle surface of the ink jet head for suctioning ink from the nozzle surface and where the height adjustment surface does not come into contact with the head unit.