INJECTOR AND SYRINGE BARREL

摘要

[Task] To provide a syringe barrel and a syringe capable of allowing an operator to feel the amount of injected medical solution or the inserting distance of a piston by a difference in sliding resistance when an injection operation is performed. [Means for Resolution] A syringe 1 includes a syringe barrel 11 which has an inner surface provided with a structure in which a sliding resistance F is changed step by step upon sliding a piston 32. The syringe barrel 11 includes steps which are formed at one or two or more positions of the inner surface in the axial direction so as to face from the rear end to the front end or from the front end to the rear end, and which include edges formed along the circumferential direction.