PROBLEM TO BE SOLVED: To provide a high frequency treatment instrument for endoscopes, where the electrode can widely expand into a T-form on the tip of a flexible sheath and does not deform even when the electrode is strongly pressed against an object to be cut, so the instrument can smoothly press and cut even the object of a large size.SOLUTION: A pair of cuts 2 or slices 2 are almost laterally symmetrically formed in parallel with the axial line on the side of an area near the end of a flexible tube 1, and as a result, are formed a pair of split pieces 3 in an area between the pair of the cuts 2 or slices 2. Easily concaved parts 4, 5 are formed near the front and rear ends of each split piece 3, while an easily convexed part 7 is formed in the middle of each split piece 3. A pair of electrode wires 9 are connected with the leading end of a conductive electric wire 8 inserted through the flexible tube 1 so that the wire 8 can move in the axial line direction. The pair of the electrode wires 9 are arranged from the end of flexible tube 1 along the surfaces of respective split pieces 3 and their tips each connected to the split pieces 3.COPYRIGHT: (C)2010,JPO&INPIT【課題】可撓性シースの先端で電極をT字状に大きく広げることができ、しかも電極が対象物に強く押し付けられても変形し難くて、大きな切除対象等であってもスムーズに押し切りすることができる内視鏡用高周波処置具を提供すること。【解決手段】可撓性チューブ1の先端近傍領域の側面に、軸線と平行方向に一対の切れ目2又は切り削ぎ部2′が略対称に形成され、それによって一対の切れ目2又は切り削ぎ部2′で挟まれた領域に一対の分割片3が形成され、各分割片3の前後両端付近に凹折れ容易部4,5が形成されて、各分割片3の中間部分に凸折れ容易部7が形成され、可撓性チューブ1内に軸線方向に進退自在に挿通配置された導電線8の先端に一対の電極ワイヤ9が連結されて、一対の電極ワイヤ9が可撓性チューブ1の先端から各分割片3の表面に沿って配置され、その先端が分割片3に連結されている。【選択図】 図1
