PROBLEM TO BE SOLVED: To provide an auxiliary tool for a syringe capable of enhancing safety at the time of puncturing an injection needle. SOLUTION: A storage unit for accommodating a syringe, which has a surface to be in contact with a human body, and a storage unit slidably attached to the storage unit, and the injection needle of the syringe is attached to the storage unit for the time being. A movable portion that can be rearranged into an advance position for advancing forward and a retracted position for retracting the injection needle to the rear for the time being, and the movable portion is urged in the retracting direction from the advanced position to the retracted position. It includes an urging means and an operation unit for sliding the movable portion in the forward direction from the retracted position to the advanced position. [Selection diagram] FIG. 9【課題】注射針の穿刺時における安全性を高めることができる注射器用の補助具の提供。【解決手段】注射器を収容する収容部であって、人体に当てる当面を有する収容部と、前記収容部にスライド可能に取り付けられ、且つ前記スライドに伴って、前記注射器の注射針を前記当面の前方に進出させる進出位置と、前記注射針を前記当面の後方に退避させる後退位置とに配置変更可能な可動部と、該可動部を前記進出位置から前記後退位置に向かう後退方向に付勢する付勢手段と、前記可動部を前記後退位置から前記進出位置に向かう前進方向にスライドさせるための操作部と、を備えている。【選択図】図９
