An electrophotographic printing device includes a fixing unit; and a temperature sensor. The fixing unit includes: a fixing member; a pressing member pressed against the fixing member; and a heater which heats at least the fixing member of the fixing member and the pressing member, the fixing unit fixing a toner image on a recording material to the recording material while carrying the recording material through a fixing nip formed between the fixing member and the pressing member. The temperature sensor is attached to a recording material supplying unit, and detects a temperature of a recording material stored in the recording material supplying unit, and a fixing temperature is controlled based on the detected temperature.