Image forming apparatus

An image forming apparatus comprising:

• a fixing device configured to fix a toner image on a recording material, wherein the fixing device includes a fixing unit including an endless fixing belt, a heating portion for heating the fixing belt, and a temperature detecting portion for detecting a temperature of the fixing belt and includes a nip forming member for forming a nip in which a recording material carrying thereon a toner image is nipped and fed between itself and the fixing belt and in which the toner image is fixed on the recording material, and wherein each of a plurality of parts including the fixing unit and the nip forming member and used in the fixing device is capable of being exchanged;
• a first storing portion configured to store information on the fixing device;
• and
• a controller configured to carry out temperature adjustment control of the heating portion on the basis of the temperature detected by the detecting portion,
• wherein in a case that a predetermined part of the plurality of parts is exchanged, the controller succeeds information other than information on the predetermined part of the information on the fixing device stored in the first storing portion, and determines a target temperature in the temperature adjustment control by using the succeeded information and information on the predetermined part used after being exchanged.