PROBLEM TO BE SOLVED: To enable a shaft part of a surgical instrument to be bent appropriately so as to approach a lesioned part and perform an effective operation for the lesioned part in an endoscope.SOLUTION: An endoscopic surgical instrument includes a slender shaft part 12, a treatment part 14 provided at the tip of the shaft part 12 for executing a treatment for a lesioned part, and a grip part 13 for gripping, which is connected to the tail end part of the shaft part 12. The shaft part 12 is formed with flexible increased parts 16 and 17 to facilitate bending of the shaft part 12.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】内視鏡下で、病変部へのアプローチと病変部への有効な操作を行えるように、手術器具のシャフト部を適切に曲げられるようにする。【解決手段】この内視鏡手術器具は、細長いシャフト部12と、シャフト部12の先端部に設けられ、病変部に処置を施すための処置部14と、シャフト部12の尾端部と連結され、把持用のグリップ部13と、からなり、シャフト部12には、シャフト部12の曲がりを容易にする屈曲性増大部16、17が形成されている。【選択図】図1
