To provide a cartridge for film housing film which does not require a piece of tape to prevent the conventional photosensitive film wound in a roll state from loosening.

This cartridge for film C housing the photosensitive roll film having trailer for shielding light formed at its rear end is equipped with a take-up shaft 2 having a core to which the film is taken up and an engaging part engaged with the film take-up shaft of the camera, and a film loosening preventing member 3 freely rotating in a circumferential direction with respect to the center of the core and preventing the film loosening by providing an inner wall whose inside diameter is nearly equal to the outer peripheral diameter of the film obtained when the film is all tightly wound round the core.