PROBLEM TO BE SOLVED: To certainly change over the rotation restriction of a front side sheath to a base side sheath between effectiveness and ineffectiveness, in a high-frequency treatment tool for an endoscope including a configuration wherein the front side sheath installed with an electrode wire in a state that the electrode wire is exposed between a pair of electrode passage holes is connected to the front side of the base side sheath rotatably around the axis and movably forward and backward in the axial direction.SOLUTION: A high-frequency treatment tool for an endoscope includes pull-in restriction stoppers 6, 7 abutting on each other such that it is restricted that a front side sheath 3 is pulled into a base side sheath 1 over them in a state that a thick diameter part 3C of the front side sheath 3 is pushed out forward from inside a distal end mouth of the base side sheath 1 if an electroconductive operation wire 2 is performed with a push-in operation from the rear end side.COPYRIGHT: (C)2014,JPO&INPIT【課題】電極ワイヤが一対の電極通過孔の間で露出する状態に取り付けられた先側シースが、基側シースの先側に軸線周り方向に回転自在且つ軸線方向に進退自在に接続された構成を備えた内視鏡用高周波処置具において、基側シースに対する先側シースの回転規制を確実に有効/無効に切り替えることができるようにすること。【解決手段】導電性操作ワイヤ2が後端側から押し込み操作されれば先側シース3の太径部3Cが基側シース1の先端口元内から前方に押し出される状態の時に、先側シース3が基側シース1内にそれ以上引き込まれるのを規制するように互いに当接する引き込み規制ストッパ6,7を設けた。【選択図】 図1
