An embodiment of an image forming apparatus includes a first image forming unit including a photosensitive drum and a fur brush for cleaning toner on the photosensitive drum and a second image forming unit including a photosensitive drum and a fur brush for cleaning toner on the photosensitive drum. In at least one embodiment for image formation, the fur brush in the first image forming unit and the fur brush in the second image forming unit start at different timings.