A movement mechanism of a mover includes a base body disposed in an inner part of an outer case of an imaging device; a mover that is movable in a first movement direction with respect to the base body between a receiving position and a projecting position, and has a locked portion; a pressing spring that presses the mover from the receiving position toward the projecting position; a moving base capable of moving in a second movement direction between a lockable position to the base body and a lock release position; a lock lever that is supported by the moving base rotatably between a lock position and an unlock position; and a driver that is connected to the moving base and is a drive source for moving the moving base in the second movement direction.