This treatment instrument includes a long shaft member having a longitudinal axis, a pair of jaws provided at the tip of the long shaft member and opened and closed in a direction intersecting with the longitudinal axis by being opened and closed, a pair of jaws A first gripping body supported by a first one of the jaws and provided with a linear member annularly curved in a plane intersecting with the opening and closing direction of the pair of jaws, and a second jaw of the pair of jaws A second gripping body supported by the pair of jaws to open and close with respect to the first gripping body and to exert a gripping force on the object to be held together with the first gripping body when closing the pair of jawsこの処置具は、長手軸を有する長軸部材と、前記長軸部材の先端に設けられ、開閉操作されることで前記長手軸と交差する方向に開閉する一対のジョーと、前記一対のジョーのうちの第1のジョーに支持され、前記一対のジョーの開閉方向と交差する面内で環状に湾曲した線状部材を備える第1の把持体と、前記一対のジョーのうちの第2のジョーに支持され、前記一対のジョーの開閉動作とともに前記第1の把持体に対して開閉し、閉じる際に前記第1の把持体とともに被把持物に対して把持力を及ぼす第2の把持体と、を有する。
