To obtain an endoscope device whose constitution is comparatively simple and which is constituted so that the position of a movable lens can be selected multi-stepwise and high accuracy is secured.

The endoscope device inserted in a bent and narrow path in a pipeline or in a human body so as to observe the bent and narrow path is provided with a lens driving mechanism 100. Then, the driving mechanism 100 is constituted so that driving force is transmitted to a tip end part by displacement produced at an outside operation part or added to the operation part or based on rotating operation in order to execute a focus switching function or a zooming function and the movable lens part 5 arranged at the tip end part is positioned at three or more positions with respect to a fixed lens barrel 4.