An image forming apparatus has an image forming unit for forming a toner image on a recording material, a first image heating unit having a first rotary member and a second rotary member forming a first nip therebetween, and a second image heating unit provided with a third rotary member forming a second nip between it and the first rotary member. The first rotary member, second rotary member and third rotary member respectively has a heater and an introducing unit introduces the recording material heated in the first nip into the second nip. A recording material separation temperature of the second image heating unit is lower than the recording material separation temperature of said first image heating unit, and when the toner image is heated in the second nip, the second rotary member heats the first rotary member.