An image forming apparatus includes an image carrier that a plurality of
toner images of differing colors are formed on a surface, and an
intermediate transfer belt positioned opposite the image carrier, the
toner images formed on the image carrier being primarily transferred onto
an intermediate transfer belt in a superimposed condition, and being
collectively secondarily transferred from the intermediate transfer belt
onto a transfer material, and the toner images of the two colors set to
be approximately identical in screen angle being consecutively
transferred in a superimposed condition onto the intermediate transfer
belt. A drive load fluctuation correction unit corrects the drive load to
the intermediate transfer belt in accordance with a cleaning device
moving into and out of engagement with the intermediate transfer belt.