A transmission member for transmitting to said body tissue energy for treating the living tissue, and the outer tube in which the transmission member is inserted, coagulation and incision apparatus according to the present invention, the outer tube relative to the transmission member the side that has a grip portion which is rotatably supported on a distal end portion, for gripping the living tissue between the transmission member, said grip portion and the transmission member are opposing, the grip portion, wherein when it is closed by rotating the transmission member side, incising the living body tissue grasped between the grasping portion and the transmitting member and the grasping portion and the transmission member are in contact over a predetermined length Non to coagulate the living tissue at a predetermined interval between the grip portion and the transmission member does not contact the contact portion for, on both sides of the longitudinal axis of the predetermined of the contact portion I have, a contact portion.この発明の凝固切開装置は、生体組織を処置するためのエネルギを前記生体組織に対して伝達する伝達部材と、前記伝達部材が挿通される外套管と、前記伝達部材に対して前記外套管の先端部に回動自在に支持され、前記伝達部材との間に前記生体組織を把持する把持部と、を有し、前記伝達部材と前記把持部とが対向する面において、前記把持部が前記伝達部材側に回動して閉じた場合に、前記伝達部材と前記把持部とが所定の長さにわたって接触して前記伝達部材と前記把持部との間に把持された前記生体組織を切開するための接触部と、この接触部の前記所定の長さ方向の軸の両側に前記伝達部材と前記把持部とが接触しないように所定の間隔を有して前記生体組織を凝固するための非接触部と、を有している。
