Patent attributes
An image forming unit attachable and detachable with respect to an image forming apparatus includes a developer container in which a plurality of developer containing parts for containing respective developers are arranged on an arrangement line; and a detachable part that detachably supports the developer container wherein the developer container is mounted to the detachable part by sliding in mounting or detaching directions, wherein the detachable part has an engaging member that is rotatably supported, a downstream end part that is positioned at a downstream side of the developer container in the mounting direction. The downstream end part swings around the rotation shaft between a first position and a second position, the developer container has an engaged part that engages the downstream end part of the engaging member when the engaging member moves to the first position, and the downstream end part of the engaging member and the engaged part are engaged with each other and maintain a mounted state under which the developer container is mounted on the detachable part.