Patent ID: 7329257

Claim:
A medical treatment instrument used for coagulating and cutting a patient's body tissue, the medical treatment instrument comprising: a treatment portion, which is arranged at a tip of the treatment instrument, and which comprises a grasp portion including a pair of grasp members, which are openable and closeable with respect to each other, for grasping the patient's body tissue; an operating portion which is arranged at a proximal end of the treatment instrument, and which is operable to open and close the pair of grasp members; a heat generating portion which is provided at a first grasp member of the pair of grasp members, and which generates heat in accordance with current supplied thereto; and a cutting member which is disposed at the first grasp portion in contact with the heat generating portion and projecting toward a second grasp member of the pair of grasp members, and which is heated by the heat generating portion to cut the patient's body tissue grasped between the grasp members; wherein the cutting member is shaped so as to be capable of cutting the patient's body tissue only when the heat generating portion is activated.