PROBLEM TO BE SOLVED: To solve the problem that the tip of a knife portion cannot be used for an incision operation, thus requiring time accordingly.SOLUTION: Provided is a high-frequency treatment instrument for endoscope, comprising: a flexible sheath a tip member inserted into a tip of the flexible sheath a wire inserted into the flexible sheath a rod-shaped knife portion, the amount of the knife protruding from a tip surface of the flexible sheath being changed as the wire advances or retracts within the flexible sheath and a contact connectable with a high-frequency power supply for passing a high-frequency current through the tip member and the knife portion via the wire. The knife portion has a rise portion at a position retracted by a predetermined amount from its most distal tip point, which rise portion protrudes from a side surface of the knife portion, such that when the knife portion retracts with the wire, the rise portion abuts against the tip member causing the knife portion to stop at a position where the tip of the knife portion protrudes from the tip surface of the tip member by a predetermined amount. The rise portion tapers off as it goes away from its base.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】ナイフ部の先端部分で切開できない分、切開作業に時間が掛かる。【解決手段】内視鏡用高周波処置具を、可撓性シースと、可撓性シースの先端に嵌入された先端部材と、可撓性シース内部に挿通されたワイヤと、該ワイヤが可撓性シース内で進退されることにより、可撓性シースの先端面からの突出量が変化するロッド状のナイフ部と、ワイヤを介して先端部材及びナイフ部に高周波電流を流すための高周波電源を接続可能な接点部とを備える構成とする。この構成において、ナイフ部は、その最も先端から所定量後退した位置に、該ナイフの側面から突出する突起部材が設けられており、ワイヤと共に後退されると、突起部材が先端部材に当接して、ナイフ部の先端部分が該先端部材の先端面から所定量突出した位置で停止する。突起部材は、先端側が先細り形状となっている。【選択図】図2
