To provide, in a reduced cost, a lens-equipped photographic film unit and an external electronic flash unit which is freely attachably and detachably mountable on the lens-equipped photographic film unit.

A linkage member 40a which moves in linkage with the moving operation of an operating member 34 is partly exposed on the left side face of an external electronic flash unit 30. Also, a linkage member 21a is partly exposed on the right side face of the lens-equipped photographic film unit 10. When the external electronic flash unit 30 is mounted on the lens-equipped photographic film unit 10, the linkage member 40a and the linkage member 21a adjoin. When a prescribed photographing mode is chosen by the moving operation of the operating member 34, the inking member 21a is pressed and moved by the linkage member 40a, and the operation of the lens-equipped photographic film unit 10 is changed to the prescribed photographing mode by the movement of the linkage member 21a.