Image forming apparatus

An image forming apparatus that forms an image by causing a recording sheet on which an unfixed toner image is formed to pass through a fixing nip, and thermally fixing the toner image onto the recording sheet, the fixing nip being formed by pressing a pressing member against a fixing member that is heated, the image forming apparatus comprising:

• a heater heating the fixing member;
• an acquisition unit acquiring, when an image for one page includes a coded identifier image in which coded information is embedded, information on a range of formation of the coded identifier image on the recording sheet, the range being defined in terms of a sheet-passing direction;
• a target temperature switching unit switching a target temperature, the target temperature being a temperature at which temperature of the fixing member is to be maintained, and being switched at least between a first fixing temperature and a second fixing temperature that is higher than the first fixing temperature;
• a controller controlling the heater so that the temperature of the fixing member is maintained at the target temperature to which the target temperature switching unit has switched, wherein
• the target temperature switching unit switches the target temperature at a timing such that the temperature of the fixing member is equal to the second fixing temperature while a toner image in the range of formation of the coded identifier image is being fixed.