To restrain a size in a height direction to a minimum while using the photographic film cartridge of 135 type.

A notched part 16 by which a cartridge chamber 15 provided on the side of the grip part 11a of a camera body 11 is extended in a longitudinal direction is formed on the upper part of the cartridge chamber 15. A protrusion part 12a to clog the notched part 16 in terms of light tightness at the closing position of a back cover 12 is formed on the back cover 12, and a shutter button 17 is arranged at the center part of the protrusion part 12a. A space into which the cartridge body of a photographic film cartridge is inserted is formed on the upper side of the cartridge chamber 15 by the notched part 16 when opening the back cover 12, so that the need of providing an extra space in the up-and-down direction of the cartridge chamber 15 when closing the back cover 12 is entirely eliminated.