PROBLEM TO BE SOLVED: To provide an endoscope for a gastric fistula catheter that can prevent buckling and collapse of a portion of an insertion part, while eliminating a gap between the portion of the insertion part and the gastric fistula catheter, by deforming the portion of the insertion part in an enlarged diameter direction.SOLUTION: An insertion part 20 extends from an operation part 11, and can be inserted and removed to/from a gastric fistula catheter 40. The insertion part includes: a tip rigid part 24 constituting an end part at the side opposite to the operation part a curved part 25 curved according to the operation of curving operation means 14 provided in the operation part connected to the tip rigid part a first flexible tube 21 connected to the operation part a second flexible tube 26 connected to the end part at the side opposite to the tip rigid part of the curved part a non-deformable pipe member 29 for connecting the first flexible tube with the second flexible tube and a radial direction variable body 28 constituting a sheath of a portion positioned between the first flexible tube and the second flexible tube of the insertion part mounted on an outer circumferential surface of the pipe member, and having air tightness and capable of varying a radial dimension.COPYRIGHT: (C)2014,JPO&INPIT【課題】挿入部の一部を拡径方向に変形させることにより挿入部の当該部分と胃瘻カテーテルとの間の隙間を無くすことが可能でありながら、挿入部の当該部分の座屈や潰れを防止可能な胃瘻カテーテル用内視鏡を提供する。【解決手段】操作部11から延び、かつ胃瘻カテーテル40に対して挿脱可能な挿入部20が、操作部と反対側の端部を構成する先端硬質部24と、先端硬質部に接続する、操作部に設けた湾曲操作手段14の操作に応じて湾曲する湾曲部25と、操作部に接続する第一可撓管部21と、湾曲部の先端硬質部と反対側の端部に接続する第二可撓管部26と、第一可撓管部と第二可撓管部を接続する変形不能なパイプ材29と、パイプ材の外周面に取り付けた、挿入部の第一可撓管部と第二可撓管部の間に位置する部分の外皮を構成する、気密性を有しかつ径方向寸法を可変な径方向可変体28と、を備える。【選択図】図3
