PROBLEM TO BE SOLVED: To provide an injection needle for an endoscope, capable of preventing an adhesive from closing the inner cavity of a puncture needle and a chemical solution from leaking through a gap between the puncture needle and a puncture needle fixing member in connecting the puncture needle to an inner cylinder via the puncture needle fixing member.SOLUTION: An injection needle for an endoscope includes a puncture needle, a puncture needle fixing member for allowing the puncture needle to be inserted thereinto, and an inner cylinder for allowing the puncture needle fixing member to be inserted to the distal end. The puncture needle fixing member has a part in which the outer diameter is reduced toward the base end side. The puncture needle fixing member thus described can efficiently prevent a chemical solution from leaking through a gap between the inner cylinder and the puncture needle fixing member or a gap between the puncture needle fixing member and the puncture needle.COPYRIGHT: (C)2013,JPO&INPIT【課題】穿刺針と内筒とを穿刺針固定部材を介して接続する場合において、接着剤が穿刺針の内腔をふさぐことを防止すると共に、薬液が穿刺針と穿刺針固定部材の隙間から漏れることのない内視鏡用注射針を提供する。【解決手段】本発明の内視鏡用注射針は、穿刺針と、穿刺針が挿入される穿刺針固定部材と、穿刺針固定部材が先端部に挿入される内筒とを備える。そして、穿刺針固定部材は基端側に向かって外径が縮径する部分を有している。このような穿刺針固定部材は内筒と穿刺針固定部材との間または穿刺針固定部材と穿刺針との間の間隙からの薬液の漏れを効果的に防止することができる。【選択図】図3
