An imaging device according to the present invention comprises: an imaging section photoelectrically converting an object image and outputting image data; a display section displaying the object image based on the image data; an acceleration sensor section detecting vibration in at least one direction among a plurality of directions of a camera; a determination section continuously determining an output equal to or greater than a gravity force by means of the acceleration sensor section; and a power supply control section supplying power to the imaging section upon detection of an output equal to or greater than the gravity force by the determination section and also upon detection of an attitude change in a vertical direction or the like or a predetermined acceleration when a photographer sets the camera while viewing the display section of the camera.