Patent ID: 7865113

Claim:
An image forming apparatus comprising: a casing; a plurality of developing agent carriers provided in the casing and carrying developing agents of mutually different colors; an image carrier provided in the casing, supplied with a developing agent from each of the developing agent carriers, and carrying a developing agent image thereon; and a transferring unit anteroposteriorly detachably mountable to the casing on a front side of the casing, for transferring the developing agent image carried on the image carrier to a transfer medium, wherein the transferring unit comprises a projection at a rear end portion thereof, the casing comprises a restricting portion that is arranged lower than the projection of the transferring unit in a mounting state of the transferring unit and is engaged with the projection in a mounted state of the transferring unit to restrict an upward movement of the projection, and the casing comprises a first guide portion for slidably guiding the transferring unit by inclining the transferring unit from the front side to a rear side of the transferring unit so that the rear end portion of the transferring unit in the mounting state is more downwardly inclined than the rear end portion in the mounted state of the transferring unit, to engage the projection with the restricting portion.