PROBLEM TO BE SOLVED: To provide an injection needle for endoscope which does not press an inner cylinder even when an outer cylinder is bent, and can smoothly perform protrusion operation of a puncture needle.SOLUTION: An injection needle for endoscope is provided with a puncture needle, an inner cylinder provided at a distal end part, and an outer cylinder for slidably inserting the inner cylinder. The outer cylinder has a first region on a distal end side and a second region which is nearer a proximal end side than the first region is, and the first region is formed into a more flexible one than the second region. Thus, by forming the region on the distal end side of the outer cylinder into a flexible one, the injection needle for endoscope does not press the inner cylinder even when the outer cylinder is bent, and can smoothly perform protrusion operation of the puncture needle.COPYRIGHT: (C)2014,JPO&INPIT【課題】外筒を屈曲させたとしても内筒を圧迫せず、穿刺針の突出操作を円滑に行うことを可能とする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、穿刺針と穿刺針を先端部に設けた内筒と内筒を摺動可能に挿通する外筒とを備える。外筒は、先端側の第一領域と、第一領域よりも基端側の第二領域を有し、第一領域は第二領域よりも柔軟に形成されている。このように外筒の先端側の領域を柔軟に形成することにより、外筒を屈曲させたとしても内筒を圧迫せず、穿刺針の突出操作を円滑に行うことを可能とする内視鏡用注射針を提供することができる。【選択図】図1
