An image forming apparatus including, a plurality of image bearing members, a plurality of developing units which includes toner storage containers and a belt transferring toner images onto a transfer material, the image forming apparatus being capable of executing a first cleaning mode and a second cleaning mode to move the toner adhering onto the belt onto the image bearing members and to collect the adhering toner into the toner storage containers, wherein, in the first cleaning mode, the adhering toner is collected into the toner storage container of the developing unit developing a black toner, and in the second cleaning mode, a portion of the adhering toner is collected into the toner storage container corresponding to the image bearing member located at a most upstream position and a rest of the adhering toner is collected into the toner storage container of the developing unit developing the black toner.