A syringe assembly (10) includes a syringe (12), a grip (16) fitted on a barrel (18) of the syringe (12), and a protective device (14) having a cover member (32) covering a needle point (27) after injection. The grip (16) has a guide tube (42) extending from an extension body (40) in a distal direction and supporting and guiding the cover member (32) from outside when the cover member (32) is axially displaced relative to the barrel (18). The guide tube (42) has an inner peripheral surface that can abut an outer peripheral surface of the cover member (32) in an initial state.
