PROBLEM TO BE SOLVED: To provide a high-frequency treatment instrument for endoscope appropriately adapted for avoiding a situation in which accretion depositing on a surface of an energized member hampers an operator from performing proper treatment.SOLUTION: The high-frequency treatment instrument for endoscope comprises: a flexible sheath 15 insertable into a treatment instrument insertion channel of an endoscope a conductive tip member 12 fitted into a tip of the flexible sheath a conductive wire 13 inserted into the flexible sheath a conductive rod-shaped knife portion 12a connected to a tip of the wire, the amount of the knife portion protruding from a tip surface of the flexible sheath being changed when a control unit advances or retracts the wire within the flexible sheath and a contact portion connectable with a high-frequency power supply for passing a high-frequency current through the tip member and the knife portion via the wire. At least a portion of a surface area of the tip member and of the knife portion appearing to the outside is applied with a stain-proof coating.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2017,JPO&INPIT【課題】被通電部材の表面に付着した付着物によって術者が適切な処置を行うことが難しくなるという事態を避けるのに好適な内視鏡用高周波処置具を提供する。【解決手段】内視鏡用高周波処置具を、内視鏡の処置具挿通チャンネル内に挿入可能な可撓性シース15と、可撓性シースの先端に嵌入された導電性を持つ先端部材12と、可撓性シース内部に挿通された導電性を持つワイヤ13と、ワイヤの先端に接続されており、操作部によって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、導電性を持つロッド状のナイフ部12a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、先端部材とナイフ部のうち外観に現れる少なくとも一部の表面領域に防汚コーティングを施す。【選択図】図9
