PROBLEM TO BE SOLVED: To provide an endoscopic treatment instrument, when a sheath part inserted into a channel is rotationally turned about an axial line, capable of turning a treatment section in a desired direction.SOLUTION: An endoscopic treatment instrument 2 includes a sheath body 11a, a treatment section 30, an operation section body, a torque transmission member 12, a handle 42, and a forceps plug. The torque transmission member 12 has an area attached to a distal end area of the sheath body, between the area and the handle 42, extends in a lumen of the sheath body 11a along a longitudinal axis of the sheath body 11a, and provided rotationally with respect to the sheath body 11a. A proximal end of the sheath body 11a is a separate-body-type sheath area where the torque transmission member 12 is not attached, outside an outer peripheral surface of the sheath body 11a, and, in a state where the treatment section 30 is projected from the distal end of the channel, the separate-body-type sheath area is inserted into the forceps plug.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】チャンネルに挿通させたシース部を軸線周りに回動させたときに処置部を所望の向きに向かせることができる内視鏡用処置具を提供する。【解決手段】内視鏡用処置具2は、シース本体11aと、処置部30と、操作部本体と、トルク伝達部材12と、ハンドル42と、鉗子栓と、を備えており、トルク伝達部材12は、シース本体の先端領域に取り付けられた領域を有し、前記領域とハンドル42との間では、シース本体11aのルーメン内でシース本体11aの長手軸に沿って延び、シース本体11aに対して回動自在に設けられており、シース本体11aの基端側は、シース本体11aの外周面の外側にトルク伝達部材12が取付けられていない別体式シース領域であり、チャンネルの先端から処置部30を突出させた状態において、鉗子栓に別体式シース領域が挿通されている。【選択図】図2
