Patent ID: 7212774

Claim:
An image forming apparatus comprising: a rotating type developing unit including: a developing unit main body which is rotatable; a plurality of developing units disposed along a direction of rotation of the developing unit main body; and at least one developer cartridge which is disposed along the direction of rotation of the developing unit main body and supplies a developer to the developing unit; an image forming unit including at least one image carrier which is disposed to be opposed to at least a portion of the developer cartridge and configured to be installable and removable to and from the image forming apparatus; a cover allowing the developer cartridge to be installed and removed at a position of interchanging the developer cartridge in a state of being mounted with the image forming unit; and an operation hampering member hampering at least a portion of the developer cartridge which is not disposed at an interchanging position and which is exposed from a space from which the image forming unit is removed from being installed or removed while the image forming unit is removed, wherein the developer cartridge is configured to be installable and removable in a direction orthogonal to a rotating shaft; and wherein the operation hampering member comprises a projection disposed in the vicinity of one end portion in an axial direction of the rotating type developing unit and extended from the image forming apparatus along a longitudinal direction of the developer cartridge.