An image forming apparatus including a plurality of image bearing members, an electrostatic image forming device for forming an electrostatic image on the image bearing members, a plurality of developing devices for developing as developer images the electrostatic images formed on the plurality of image bearing members by using developer charged to a predetermined polarity, a primary transferring device for primarily transferring the developer images borne by the plurality of image bearing members to an intermediate transfer member at a plurality of primary transfer portions, a secondary transferring device for secondarily transferring the developer images primarily transferred to the intermediate transfer member to a recording material at a secondary transfer portion, a cleaning device for cleaning the developer on the intermediate transfer member, and a controlling device for, when a secondary untransferred developer image, which is a developer image that has not been secondarily transferred after the primary transfer, is cleaned from the intermediate transfer member, variably controlling a cleaning condition of the cleaning device in accordance with one of an image ratio and a position of the secondary untransferred developer image.