In particular, a surgical device for minimally invasive surgery, which has a shaft having a distal end to which a surgical instrument such as a gripper is mounted and a proximal end to which a surgical instrument actuator is mounted. The surgical instrument is attached to a slider set that can be interlocked with the actuating means and movable longitudinally in the opposite direction on the shaft by operating the operating instrument for operating the surgical instrument, and the slider set is adjacent to each other inside the shaft. The slider assembly is provided with a first attachment position and a second removal position, and the slider assembly is connected to the actuator by bayonet coupling at the first attachment position, and the slider assembly is fixed against rotation inside the shaft during this position. And the actuating device can be prevented from being released, and the remaining part of the slider assembly can be rotated inside the shaft at the second removal position. Tsu to the point where the coupling is releasable bet is slidable at least partially simultaneously to the outside shaft. [Selection] Figure 2特に低侵襲手術用の外科装置で、把持器などの手術器具を装着する遠位端と手術器具用作動装置を装着する近位端とがあるシャフトを有し、作動装置はハンドグリップや機械的作動手段と連動可能で、手術器具作動のための作動器具操作によりシャフト上にて相互逆向きに長手方向で移動可能なスライダ組に、手術器具が取り付けられ、スライダ組はシャフト内部で相互隣接し、第１の取付ポジションと第２の取外ポジションとを備え、スライダ組は第１の取付ポジションにてバヨネット結合で作動装置と連結され、このポジション中にシャフト内部で抗回転固定されてスライダ組と作動装置とのバヨネット結合の解除を防止し、第２の取外ポジションではシャフト内部でスライダ組の残り部分の回転が可能でスライダ組と作動装置とのバヨネットの結合が解除可能となる地点まで、少なくとも部分的にシャフト外へ同時にスライド可能である。【選択図】図２
