This syringe (1) has an outer tube (2), a gasket (3), and a pusher (4). The pusher (4) is provided with: a tubular holding part (41) which covers at least a part of an outer surface of the outer tube (2) and is movable relative to the outer tube (2) in the longitudinal direction thereof； and a pressure part (42) which is connected with the holding part (41), is inserted into the outer tube (2), and moves the gasket (3) to the distal side of the outer tube by distally a movement of the holding part (41) relative to the outer tube (2). In addition, between the holding part (41) and the outer tube (2), a guide part (8) is provided which guides the movement of the holding part (41) relative to the outer tube (2).
