An image forming apparatus includes an AC input portion to which AC power is to be supplied from a commercial power source, an image forming unit configured to form an image on a recording material, a fixing device including a first fixing heater and a second fixing heater which are configured to generate heat, the fixing device being configured to heat the image on the recording material by using the first fixing heater and the second fixing heater to fix the image to the recording material, a first relay configured to be switched between a first state in which electric connection is established and a second state in which electric connection is not established, and a second relay configured to be switched between a third state in which electric connection is established and a fourth state in which electric connection is not established.