PROBLEM TO BE SOLVED: To provide a syringe aid facilitating removing a lid body from a syringe body.SOLUTION: A syringe aid includes an aid body which is provided with a body housing part opened so as to make a syringe body retractable, a body engagement part engaging the syringe body in an axial direction, and a lid body engagement part engaging the lid body mounted on the tip of the syringe body in the axial direction. Each of the engagement parts is positioned from a body retracting position allowing inserting/removing the syringe body into/from the body housing part to a lid body removing position separated in the axial direction of the syringe body so as to remove the lid body from the syringe body. There is also included an operation part which can be pushed into the aid body and is formed so as to position each of the engagement parts from the body retracting position to the lid body removing position in accordance with pushing into the aid body, and position each of the engagement parts from the lid body removing position to the body retracting position in accordance with releasing pushing into the aid body.SELECTED DRAWING: Figure 17COPYRIGHT: (C)2016,JPO&INPIT【課題】 注射器本体から蓋体を容易に離脱させることができる注射器補助具を提供する。【解決手段】 注射器本体を抜差可能とするように開放した本体収容部と、注射器本体を軸線方向で係止する本体係止部と、注射器本体の先端部に装着される蓋体を前記軸線方向で係止する蓋体係止部とが設けられる補助具本体を備え、各係止部は、本体収容部に注射器本体を抜き差しできる本体抜差位置から、注射器本体から蓋体を離脱させるべく注射器本体の軸線方向で離反される蓋体離脱位置に位置される注射器補助具であって、補助具本体に対して押込可能であり且つ補助具本体への押し込みに伴い各係止部を本体抜差位置から蓋体離脱位置に位置させ、補助具本体への押し込みの解除に伴い各係止部を蓋体離脱位置から本体抜差位置に位置させるように構成される操作部を備えることを特徴とする。【選択図】 図17