The function part of the endoscope has, the insertion section side housing which has the insertion section 2 which possesses the bend (12) with, the substance side housing (13) with, the control lever which operates the bend (14) with. The insertion section side housing, the wire which curves the bend (20a - 20d) with, the advance and retreat possible first engagement component (19a - 19d) with, the coil spring (24a - 24d) has for longitudinal direction. The substance side housing, the operation wire which is connected to the control lever (29a - 29d) with, is connected by the operation wire and it is advance and retreat possible in longitudinal direction and the engagement possible second engagement component (27a - 27d) with, the coil spring (31a - 31d) it has for the first engagement component. Making the insertion section side housing and the substance side housing slide, when it connects, the first engagement component and the second engagement component engages, transmits operation of the control lever to the bend of the insertion section. According to this invention, the insertion section side housing the alignment do in the substance side housing, it can exchange.内視鏡の操作部は、湾曲部を有する挿入部2を備えた挿入部側ハウジング(12)と、本体側ハウジング(13)と、湾曲部を操作する操作レバー(14)とを備える。挿入部側ハウジングは、湾曲部を湾曲させるワイヤ(20a~20d)と、長手方向に進退可能な第一係合部材(19a~19d)と、コイルスプリング(24a~24d)を備える。本体側ハウジングは、操作レバーに接続された操作ワイヤ(29a~29d)と、操作ワイヤに接続され長手方向に進退可能で第一係合部材に係合可能な第二係合部材(27a~27d)と、コイルスプリング(31a~31d)を備える。挿入部側ハウジングと本体側ハウジングをスライドさせて連結すると、第一係合部材と第二係合部材が係合し、操作レバーの作動を挿入部の湾曲部に伝達する。本発明によれば、挿入部側ハウジングを本体側ハウジングに位置合わせせずに交換することができる。
