Provided is an image forming apparatus, wherein when it is predicted that a surface potential of at least one of a plurality of photosensitive drums becomes less than the predetermined potential, whenever transfer of toner images corresponding to a predetermined number of sheets is completed by a plurality of transfer rollers, continuous print is interrupted for a predetermined time, a voltage with a polarity equal to a polarity of toner is applied to the plurality of transfer rollers by a power supply or the application of the voltage to the plurality of transfer rollers is stopped during the predetermined time.