PURPOSE: To easily simplify the size discrimination of an image, which is executed thereafter, by insert-photographing a size mark corresponding to the size of an aperture for setting the size so as to be variable in accordance with a designation with regard to an exposure range, into the periphery of an image of a film.

CONSTITUTION: An A4 photographing button 12 and an A3 photographing button 14 constitute a size designating means 15 of an aperture 20, and an operator can designate the size of the aperture 20 by deciding its necessary photographic size at every original C. Also, as for light shielding plates 26, 27, both the plates can move in the opposite direction along the feeding direction of a film F, and in accordance with separation and approach of both the plates, its notches 261, 271 become a superposed state from a connected state, and the aperture 20 for each size is formed. In this way, by sensors S1, S2, a position of the light shielding plate 27, 27 and a size of the aperture 20 are detected and discriminated. An insert-photographing mechanism 18 insert-photographs a size mark corresponding to a size of this aperture, into the periphery of an image of the film.