Abstract: In a photographic camera, closing sliding movement of a camera back moves a film-engaging member mounted on the back to thread a film leader from a film cartridge to a take-up drum. At the completion of closing movement of the camera back, a separator disengages the film-engaging member from the leader. This permits the take-up drum to advance an unexposed section of the film from the cartridge and to wind an exposed section of the film onto the drum, each time the drum is rotated. A rewind member is provided for rewinding the exposed film into the cartridge by rotating a film spool connected in the cartridge to an end portion of the film. An actuator on the camera back moves the rewind member into engagement with the spool in response to closing movement of the camera back. The engagement secures the cartridge in place during advancement of the film to the take-up drum, and permits the rewind member to rotate the spool to rewind the film into the cartridge.