Patent ID: 8135306

Claim:
An image forming apparatus which forms an image on a recording medium, comprising: a casing; and a supporting member which is movable between an inner position in which the supporting member is located at an inner side of the casing and an outer position in which the supporting member is located at an outer side of the casing and that has a mounting portion on which a first process unit and a second process unit are detachably mounted; wherein the first process unit is mounted on the mounting portion on a most downstream side of the mounting portion in a pull-out direction in which the supporting member is drawn out from the inner position to the outer position, and the second process unit is mounted on the mounting portion on an upstream side of the first process unit in the pull-out direction, and in a state that the first process unit and the second process unit are mounted on the mounting portion of the supporting member, the first process unit has a protruded portion which protrudes in an orthogonal direction orthogonal with respect to the pull-out direction more than the second process unit protrudes in the orthogonal direction.