An image forming apparatus has a fixing unit for heat fixing an unfixed
image formed on a recording material at a nip, with the fixing unit
having a rotary fixing member disposed for contacting with the recording
material; a heating member for externally heating the rotary fixing
member; and a control for stopping revolution of the rotary fixing member
in association with a door opening in the image forming apparatus,
wherein the heating unit is controlled in association with the door
opening and the contact state of the heating member and fixing member.