To take out a cartridge when a mark showing the using state of the film thereof is set at a developed position.

A lamp for confirming the taking-out of a cartridge 24 arranged on the front surf ace of this viewer is turned on when a white plate 7 is set at the developed position (aperture part 5) and turned on once every time that the spool of the cartridge 1 is rotated once. Therefore, when the cartridge 1 is taken out in the case that the film is housed in the cartridge 1 and the lamp 24 is turned on, the cartridge 1 whose display is set at the mark developed position 4 can be taken out.