The insertion portion 2 having the bending portion 7, the operation portion 3, the lever 45, and the bending operation member 47 are provided. The bending operation member 47 moves the finger placement portion 46 on the plane M with respect to the inclined surface 3 k. When the placement surface 3 s is placed on the plane M toward the side, the gap S is provided at a position where the gap S is formed between the finger placement portion 46 and the plane M. 湾曲部７を有する挿入部２と、操作部３と、レバー４５と、湾曲操作部材４７と、を具備し、湾曲操作部材４７は、傾斜面３ｋに対して、指置き部４６を平面Ｍの側に向けて載置面３ｓを平面Ｍ上に載置したときに、指置き部４６と平面Ｍとの間に隙間Ｓが形成される位置に設けられている。
