PROBLEM TO BE SOLVED: To provide a treatment instrument for endoscopes for enabling a procedure of tissue ablation or the like more easily.SOLUTION: The treatment instrument for endoscopes includes a bar-shaped high-frequency knife 2 which is inserted into a body cavity through an endoscope for performing an incision treatment, a wire 3 having a distal end where the high-frequency knife 2 is connected, a sheath 4 which is made of an insulating material and into which the wire 3 is inserted, a body where a proximal end of the sheath 4 is connected, and a slider where the proximal end of the wire 3 is fixed and which is disposed to slide in the axial direction relative to the body. The high-frequency knife 2 includes a large diameter part 6 having an outer diameter which is larger than the inner diameter of the sheath 4 at the distal end.COPYRIGHT: (C)2010,JPO&INPIT【課題】組織切除等の手技をより容易に行うことができる内視鏡用処置具を提供する。【解決手段】本発明の内視鏡用処置具は、経内視鏡的に体腔内に挿入されて切開処置を行うための棒状の高周波ナイフ2と、高周波ナイフ2が前端に接続されたワイヤ3と、絶縁性材料からなり、ワイヤ3が挿通されるシース4と、シース4の後端が接続された本体と、ワイヤ3の後端が固定され、本体に対して軸線方向に摺動可能に配置されたスライダとを備え、高周波ナイフ2は、先端にシース4の内径よりも大きい外径を有する大径部6を有することを特徴とする。【選択図】図2
