PROBLEM TO BE SOLVED: To provide a medicine injection tool that prevents flowable medicine stored inside from leaking to the outside.SOLUTION: A medicine injection tool for injecting flowable medicine into a body comprises a long-sized insertion part, the insertion part comprising a long-sized storage container 3 and a long-sized outer member 4 covering a tip of the storage container and a lateral part region continuous to the tip. At the tip of the storage container is formed an outflow hole 8 from which flowable medicine stored in a storage part can flow out. Between the storage container and the outer member is formed a gap part 12 having a predetermined interval into which flowable medicine having flowed out from the outflow hole can flow in. The storage container and the outer member are configured to be relatively movable along a longer direction of the insertion part. The outer member has: a medicine discharge hole 13 making the gap part communicate with the outside； and a medicine leak prevention part 16. The medicine leak prevention part closes the outflow hole provided at the tip of the storage container in a first state in which the tip of the storage container is close to a tip of the outer member.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2020,JPO&INPIT【課題】内部に貯留される流動性薬剤が外部に漏出することを防止する薬剤注入器具を提供する。【解決手段】体内に流動性薬剤を注入する薬剤注入器具であって、長尺状の挿入部を備え、挿入部は長尺状の貯留容器３と、貯留容器の先端部及び先端部に連なる側面部領域を被覆する長尺状のアウター部材４とを備え、貯留容器の先端部には、貯留部内に貯留される流動性薬剤が流出可能な流出孔８が形成されており、貯留容器とアウター部材との間には流出孔から流出した流動性薬剤が流入可能な所定間隔の空隙部１２が形成され、貯留容器とアウター部材とは挿入部の長手方向に沿って相対移動可能に構成されており、アウター部材は空隙部と外部とを連通する薬剤吐出孔１３と、薬剤漏出防止部１６とを備えており、貯留容器の先端部とアウター部材の先端部とが近接した第１状態において、薬剤漏出防止部が貯留容器の先端部に設けられる流出孔を閉塞する。【選択図】図５
