Patent ID: 7391990

Claim:
A color image forming apparatus comprising: a plurality of image forming units, each having an image bearing member for supporting a developer image formed with a developer corresponding to a color in accordance with color-separated image information that is obtained by separating image information into plural color components and subjecting them to image processes; an intermediate transfer medium to which a multiple number of developer images are transferred in layers; a transfer unit configured to transfer the developer images that have been transferred in layers on the intermediate transfer medium, to a print medium; and a developer collecting section configured to collect, at least, remaining developers that have not been transferred from the image bearing members to the intermediate transfer medium but have been left over on the image bearing members and remaining developers that have not been transferred from the intermediate transfer medium to the print medium but have been left over on the intermediate transfer medium, wherein a positioning member which is set with a developer collecting container for storing the collected developers and positions at least the plurality of image forming units relative to an apparatus frame, is removably attached to the apparatus frame on one side of the apparatus frame.