PROBLEM TO BE SOLVED: To more reliably transmit operation force to a leading end of a treatment instrument and operate a joint while maintaining an operation method similar to that of a conventional manual treatment instrument.SOLUTION: An operation input device 1 for an endoscope treatment instrument for operating a treatment instrument having a joint at a leading end of an elongated trunk part 4a introduced through an endoscope channel includes a grip part 5 of a form that can be gripped by a palm, and at least a little finger and a ring finger of one hand H of an operator, an operation part 6 arranged at a position where it can be operated by a thumb of the gripping hand H in a state that the grip part 5 is gripped for inputting an operation command for actuating the joint, and a friction-fixing part 7 for fixing the operation part by friction by pressing a middle position in the longitudinal direction of the trunk part 4a by an index finger of the gripping hand in a state that the grip part 5 is gripped.COPYRIGHT: (C)2015,JPO&INPIT【課題】従来の手動の処置具と同様の操作方法を維持しつつ、操作力を処置具の先端まで、より確実に伝えながら、関節の操作を行う。【解決手段】内視鏡のチャネルを介して導入される細長い胴部4aの先端に関節を有する処置具を操作するための内視鏡処置具用操作入力装置1であって、操作者の片手Hの掌と、少なくとも小指および薬指とによって把持可能な形態の把持部5と、該把持部5を把持した状態で、把持している手Hの親指によって操作可能な位置に配置され、関節を作動させるための操作指令を入力させる操作部6と、把持部5を把持した状態で、把持している手の人差し指によって胴部4aの長手方向の途中位置を押しつけて摩擦により固定する摩擦固定部7とを備える内視鏡処置具用操作入力装置1を提供する。【選択図】図3
