The operation instrument directing the opposite of the salient which opposes mutually, in order to move, includes the 1st component which is deformation possible. It is received to the opposite of opening which as for the salient, in order around the axis which is stipulated with that the 1st component to be able to revolve vis-a-vis the 2nd component, is the 2nd component and opposes. With other feature, as for the operation instrument, the 1st jaw the 1st pin which revolution possibly is connected is not the joint and the 2nd pin which connects the distal (2036) edge of the operation component to the 1st jaw is not the joint and the 3rd pin which connects the steering wheel to the proximal edge of the operation component is not the joint and, is included in the 2nd jaw. The 3rd pin there is no joint, to convert motion of the steering wheel to the axis motion of the operation component, the 2nd pin is not the joint, the 1st pin is not converts axis motion of the operation component, to the revolution possible motion of the 1st jaw for the 2nd jaw around the joint.手術器具は、対向する突出部の対を互いに向けて動かすように変形可能である第1の部材を含む。突出部は、それによって規定される軸線の周りを第1の部材が第2の部材に対して旋回できるように、第2の部材にある対向する開口の対に受けられる。他の態様では、手術器具は、第1の顎を第2の顎に旋回可能に結合する第1のピン無し接合部と、作動部材の遠位端を第1の顎に結合する第2のピン無し接合部と、ハンドルを作動部材の近位端に結合する第3のピン無し接合部と、を含む。第3のピン無し接合部は、ハンドルの運動を作動部材の軸線運動に変換し、第2のピン無し接合部は、作動部材の軸線運動を、第1のピン無し接合部の周りの第2の顎に対する第1の顎の旋回可能な運動に変換する。
