To provide an endoscope apparatus more efficiently reducible in power consumption by controlling the supply of a power source after determining a circuit or the like in use correctly.

The endoscope apparatus 1 includes a light source control circuit 17 controlling a light source for illuminating a subject; a CCU 15 (camera control unit) performing predetermined image processing to an imaging signal to generate an image signal; an image recording/reproducing circuit 16 recording the image signal in a recording medium or reproducing the image signal recorded in the recording medium; a curve control circuit 18 controlling the curve operation of a distal end 2a; and an acceleration sensor 13 detecting the movement of the distal end 2a. A system control circuit 20 controls the supply of the power source to the light source control circuit 17, the CCU 15, the image recording/reproducing circuit 16, the curve control circuit 18 and an operating part 5 according to a currently executed operation mode, the situation of button operation of the operating part 5, and the operating state of the distal end 2a obtained from the output of the acceleration sensor 13.