Patent ID: 8385774

Claim:
An image forming apparatus comprising: a main body casing; a holder unit configured to be movable between an accommodated position where the holder unit is accommodated in the main body casing and a pulled out position where the holder unit is pulled out from the main body casing in a predetermined direction; a plurality of photosensitive drums configured to be held by the holder unit and juxtaposed with each other with an interval between neighboring photosensitive drums in the predetermined direction; a plurality of developing units configured to be held by the holder unit and each corresponding to each photosensitive drum to develop the corresponding photosensitive drum; and a plurality of toner cartridges detachably attached to the holder unit when the holder unit is in the pulled out position and each corresponding to each developing unit to supply toner, each of the toner cartridges comprising: a case containing the toner and formed with an opening at a position confronting the corresponding developing unit in a state that the toner cartridge is attached to the holder unit; a shutter movable between a block position where the shutter blocks the opening and an open position where the shutter opens the opening; a first operation portion provided on the shutter and movable between a first position and a second position, the shutter being located at the open position when the first operation portion is located at the first position, the shutter being located at the block position when the first operation portion is located at the second position; and a second operation portion provided on the shutter and movable between a third position and a fourth position, the shutter being located at the open position when the second operation portion is located at the third position, the shutter being located at the block position when the second operation portion is located at the fourth position, and an interference unit that is configured such that the first operation portions abut the interference unit to be displaced from the second position to the first position when the holder unit is moved from the pulled out position to the accommodated position and such that the second operation portions abut the interference unit to be displaced from the third position to the fourth position when the holder unit is moved from the accommodated position to the pulled out position.