Patent ID: 7427282

Claim:
A high-frequency cutting instrument for an endoscope, comprising: a flexible sheath formed of insulating material; a high-frequency electrode placed to be exposed on a lateral part of the flexible sheath adjacent to a tip of the flexible sheath; a conductive wire inserted into the flexible sheath and electrically connected to the high-frequency electrode; and an index mark which is formed at a position shifted linearly from a position opposite to the high-frequency electrode, wherein the flexible sheath is separated into a distal sheath and a proximal sheath at a separating position along the flexible sheath, the distal sheath and the proximal sheath are connected together at the separating position to be rotatable relative to each other around an axis line of the flexible sheath, the distal sheath is rotated relative to the proximal sheath around the axis line by rotating the conductive wire around the axis line at a proximal end of the proximal sheath, and the index mark is formed on the distal sheath and extends linearly in an axial direction of the distal sheath, further comprising: a handle connected to the proximal end of the proximal sheath to be held by an operator; and a rotating part connected to a rear end of the conductive wire extending from the proximal end of the proximal sheath to be operated for rotating the conductive wire around the axis line, the rotating part being provided with a connection terminal to which a high-frequency power cord for supplying power to the high-frequency electrode is connected.