PROBLEM TO BE SOLVED: To provide an endoscope surgical treatment tool that has two or more bent parts independently operable to be bent and whose tip forceps piece can be freely opened/closed and rotated, and to provide a connection member of the tool.SOLUTION: An endoscope surgical treatment tool includes: an insertion part 10 at one end of a pipe-like body 2 and an operation part 20 at the another end. The insertion part 10 has two or more bent parts 11a, 11b and a pair of forceps pieces 12. The operation part 20 has bend operation parts 21a, 21b corresponding to bent parts 11a, 11b respectively, an opening/closing operation part 22, and a rotation operation part 23, and by first to third connection members (linear members) provided inside the body 2, rotation operation of the bent parts 11a, 11b and retraction and rotation operation of the forceps pieces 12 become possible independently. At least one of the connection members has one slit formed in a spiral shape, and the slit has at least one non slit part.COPYRIGHT: (C)2015,JPO&INPIT【課題】独立して屈曲操作可能な2以上の屈曲部を有し、先端の鉗子片が開閉自在かつ回転自在な内視鏡手術用処置具とその連結部材を提供する。【解決手段】パイプ状の本体2の一端に挿入部10、他端に操作部20を備える内視鏡手術用処置具であって、挿入部10は、2以上の屈曲部11a,11bと一対の鉗子片12を有する。操作部20は、屈曲部11a,11bの夫々に対応する屈曲操作部21a,21bと開閉操作部22と回転操作部23とを有し、本体2内部に設けられた第1~第3の連結部材(線状部材)によってそれぞれ独立して屈曲部11a,11bの回転操作と鉗子片12の進退・回転操作が可能となる。連結部材の少なくとも1つは、らせん状に形成された1条のスリットを有し、スリットは少なくとも1つの非スリット部を有する。【選択図】図1
