Patent ID: 7717914

Claim:
A treatment device having a pair of first and second jaws capable of opening/closing with respect to each other at a tip end portion comprising: a relatively blunt tissue pressing portion provided on a surface portion of the first jaw opposite the second jaw and having a projection portion projecting toward the second jaw side; a receiving member provided on a surface portion of the second jaw opposite the first jaw at a position opposite the tissue pressing portion; and a plurality of electrode portions comprising a first electrode portion, a second electrode portion and a third electrode portion, the first and the third electrode portions being provided at the first jaw and the second electrode portion being provided at the second jaw, so that a high-frequency current flows through a living tissue compressed by the tissue pressing portion and the receiving member, wherein the first electrode portion is formed by the projection portion alone of the tissue pressing portion of the first jaw, the third electrode portion is formed so as to cover an insulating member electrically insulated by the projection portion and to be exposed on the surface of the second jaw side, and the second electrode portion is provided at the second jaw so as to hold the receiving member formed of the insulating member.