To prevent unauthorized reuse of a lens-fitted photographic film main body and to easily reuse the unit.

A cover 12 for pulling out a cartridge containing an exposed photographic film after use is attached to the outer surface of a lens-fitted photographic film unit main body. A stopper 35 is disposed so that it can freely enter and leave the opening and closing passage of shutter blades 27. The stopper 35 is energized by a spring 36 in a direction in which it projects into the opening and closing passage of the shutter blades 27. The stopper 35 is pressed down by one end 44 of a holding member 37 so that it may not project against energizing by the spring 36. A coupling member 44 disposed on the cover 12 is engaged with the other end 43 of the holding member 37. The coupling member 44 is rotated interlocked with the opening of the shutter blade 27 to cause the stopper 35 to project into the opening and closing passage of the shutter blades 27. After thrusting the stopper 35, the coupling member 37 is returned to the original place and reused.