Patent ID: 7382999

Claim:
An image forming apparatus, comprising: a first unit configured to be attached to and detached from an apparatus main body; a second unit configured to be attached to and detached from the first unit; wherein the second unit is configured to be attached to and detached from the apparatus main body integrally with the first unit, and is further configured to be attached to and detached from the first unit with the first unit remaining mounted in the apparatus main body; two guide members for the second unit, with one attached to the apparatus main body and the other attached to the first unit, that retain from both sides and are configured to support the second unit to enable attachment and detachment; and a plurality of guide members for the first unit that are configured to be attached to the apparatus main body, and retain from both sides and support the first unit to enable attachment and detachment, wherein one of the guide members that supports the second unit is mounted on one of the guide members for the first unit, or is formed integrally with one of the guide members for the first unit.