To surely stop power supply to a charge inhibition IC and to effectively prevent the illegal reuse of a film unit.

A plate for displaying the number of frames 55 is rotated step by step in accordance with the feed of a photographic film 24. When the number of remaining frames becomes zero on the plate 55 in accordance with the winding operation after finishing photographing on the final photographing frame, one armature 42a of a detection switch 42 falls into a recessed part 55d formed in the lower side 55b of the plate 55 and separates from the other armature 42b, thereby stopping the power supply to the IC 40. When the power supply to the IC 40 is stopped once, the operation of charging an electronic flash device is inhibited unless a prescribed release signal is inputted even if the power supply is restarted.