An image forming apparatus includes: an image supporter that supports an image to be transferred to paper; a transfer belt that is opposed to the image supporter and forms a nip; and a first heater and a second heater that heat the transfer belt, wherein, the first heater has higher performance to uniformly heat an entire area of the transfer belt than the second heater; and the second heater has higher performance to respond to a temperature change of the transfer belt in a case of output change than the first heater.