Patent ID: 8725272

Claim:
A high-frequency treatment instrument comprising: a pair of forceps members that includes a conductive electrode portion and an insulating portion and is supported by a rotation shaft so as to be relatively rotatable; an operation section configured to open and close the pair of forceps members; an operation wire that transmits an operation input to the operation section to the pair of forceps members; a connection member provided at a distal end of the operation wire and having a pair of link rotation shafts; a pair of link members that includes a first link member and a second link member, being arranged parallel when the pair of the forceps members is closed and capable of moving in a direction separating from each other, in which each first end portion of the first and second link members is rotatably connected to each proximal end portion of the pair of forceps members, and each second end portion of the first and second link members is rotatably connected to each of the pair of link rotation shafts; and a rotation contact member that is rotatably connected to the pair of forceps members around the rotation shaft and is formed of a conductive member; wherein a first space is formed between the first and second link members when they are arranged parallel to each other, and is provided outside of movement range of these link members, a second space is formed between the pair of the link rotation shafts, a power feeding wire is provided, in which one end thereof is electrically connected to the rotation contact member, a part of an intermediate portion of the power feeding wire is disposed so as to pass through the first space and the second space, and the other end thereof is electrically connected to a power supply capable of supplying electric power, each of the link rotation shaft is separated from an axis of the operation wire by the same distance and faces with each other interposing the axis, and the power feeding wire and the pair of link members are arranged so as not to overlap each other when seen from an axial direction of the pair of link rotation shafts.