To reduce the dimension in a lateral direction of a film unit with a lens so as to obtain the compact film unit with a lens by disposing a cylindrical battery and a main capacitor below an exposure part.

The cylindrical battery 13 and the main capacitor for a stroboscope 14 are arranged between a scroll chamber 10a and a cartridge chamber 10b below the exposure part 10c so that their longitudinal directions may be in parallel with the feeding direction of film F. By using an AAA type battery as the battery 13, especially, the width of the film unit with a lens is prevented from getting thick even when the battery 13 and the capacitor 14 are juxtaposed. Since a part C1 where a film entrance exists is projected from other outer periphery part C2, a distance between the scroll chamber 10a and the cartridge chamber 10b is constituted so that the dimension D2 on a photographing lens side may be larger than the dimension D1 on a film side.