A waste toner collecting apparatus of the present invention reliably
prevents waste toner from spilling when replacing the waste toner box by
opening the front cover of an image forming apparatus as the first
through fifth shutters close the respective waste toner conveyance end
sections. The first through fifth shutters are locked when no waste toner
box is mounted in the image forming apparatus. The first through fifth
shutters are unlocked when a waste toner box is mounted in the image
forming apparatus. It can reliably prevent an operation error of
operating the image forming section with the waste toner conveyance end
sections left in an open state as the stay of the cover presses the first
through fifth shutters when a waste toner box is not mounted.