There is provided an endoscope apparatus which can achieve the improvement of operability with a simple configuration related to the operation of a forceps elevator. The endoscope includes: a forceps elevator which is erectably provided at the distal end part of an operation part that is provided to the insertion part, in an erecting motion range from the minimum angular position to the maximum angular position, and which guides a treatment tool led out from the distal end part； and a locking mechanism which locks the movement of the forceps elevator. An amount of force for locking the movement of the forceps elevator may be varied depending on a direction of that movement and a position of the forceps elevator.
