Patent ID: 8787796

Claim:
An image forming apparatus comprising: a body; a developing cartridge detachably installed within the body through an opening provided at the body, the developing cartridge being provided with a waste developing agent outlet to discharge waste developing agent; a developing agent cartridge detachably mounted to the developing cartridge, the developing cartridge comprising a developing agent storage section to supply developing agent to the developing cartridge, and a waste developing agent storage section provided with a waste developing agent inlet to receive the waste developing agent discharged from the waste developing agent outlet; a body cover to open or close the opening of the body; a first shutter member to open the waste developing agent inlet when the developing agent cartridge is mounted to the developing cartridge installed within the body; and a second shutter member to open the waste developing agent outlet when the body cover closes the opening after mounting the developing agent cartridge, wherein the first shutter member closes the waste developing agent inlet when the developing agent cartridge is separated from the developing cartridge.