Provided is an insertion device capable of efficiently transmitting an operation force inputted to a slide member via a transmission member to a functional unit to surely obtain a desired function. The endoscope 1 is provided with a slide member 53 having an input portion to which an operating force to move in the direction of the longitudinal axis 53 a is inputted, a slide member 53 provided at a position away from the input portion in the slide member 53 and crossing the longitudinal axis 53 a A shaft member 54 having a shaft 54a which is rotatable around the shaft member 54 and is moved as the slide member 53 moves in the direction of the longitudinal axis 53a and rotates around the shaft member 54 to thereby form a longitudinal shaft 53a A link mechanism part 55 for changing the direction of a force acting in a direction, a fixed function part 56 functioning by receiving the force converted by the mechanism part 55, and a mechanism 55 for moving the slide member 53, the fixed function part 56 And a regulating member 60 that regulates the movement of the slide member 53 with respect to the intersecting direction in the movement position of the slide member 53 when a force is applied to the regulating member 60.スライド部材に伝達部材を介して入力された操作力を効率良く機能部に伝達して確実に所望の機能を得られる挿入機器を提供する。内視鏡1は、長手軸53a方向に移動させる操作力が入力される入力部を備えたスライド部材53と、スライド部材53において入力部から離間する位置に設けられ、長手軸53aに対して交差する軸54aを有する軸部材54と、軸部材54周りに回転自在に配設され、スライド部材53の長手軸53a方向への移動に伴って移動されて軸部材54周りに回転して長手軸53a方向に作用する力の方向を変換するリンク機構部55と、機構部55によって変換された力を受けて機能する固定機能部56と、スライド部材53の移動に伴って機構55が固定機能部56に対して力を付加する際、スライド部材53の移動位置においてスライド部材53が交差方向に対して移動することを規制する規制部材60と、を具備する。
