PROBLEM TO BE SOLVED: To provide an endoscope capable of surely preventing large loads from being applied to the endoscope when a difference between an inner pressure of a connector part and an outer pressure to a movable valve body becomes a prescribed value or larger.SOLUTION: An endoscope includes: a support cylinder 38 whose inner side end part is communicating with an internal space of a connector part 14 and outer side end part is opened a movable valve body 45 provided inside the support cylinder and freely slidable a valve body internal flow path 53 formed in the movable valve body valve body holding means 37, 44, and 60 for holding the movable valve body at a closed position when a difference between force in the direction moving the movable valve body from the closed position to an open position and force in the direction of moving it from the open position to the closed position, that are put on the movable valve body, is smaller than a prescribed value, and allowing the movement of the movable valve body to the open position when the difference becomes the prescribed value or larger and a closed position stopper portion 55 provided in the movable valve body, for regulating sliding of the movable valve body to the side opposite to the open position across the closed position by abutting on the support cylinder when the movable valve body is positioned at the closed position.COPYRIGHT: (C)2014,JPO&INPIT【課題】コネクタ部の内圧と可動弁体に対する外圧の差が所定値以上の大きさになったときに内視鏡に大きな負荷が掛かるのを確実に防止できる内視鏡を提供する。【解決手段】内側端部がコネクタ部14の内部空間と連通しかつ外側端部が開口する支持筒38と、支持筒の内部に設けたスライド自在な可動弁体45と、可動弁体に形成した弁体内部流路53と、可動弁体に掛かる該可動弁体を閉位置から開位置へ移動させる方向の力と開位置から閉位置へ移動させる方向の力の差が所定値より小さいときは可動弁体を閉位置に保持し、この差が所定値以上になったときに可動弁体が開位置に移動するのを許容する弁体保持手段37、44、60と、可動弁体を閉位置に位置するときに支持筒に当接して、該可動弁体が閉位置を挟んで開位置と反対側にスライドするのを規制する、可動弁体に設けた閉位置ストッパ部55と、を備える。【選択図】図6
