PURPOSE: To efficiently prevent a recording paper from being soiled by unfixed toner stuck on a fixing means after paper jamming or the abnormality of a device such as an abnormal image forming action is eliminated.

CONSTITUTION: When the abnormality(the paper jamming or the abnormal image forming action) occurs in the midst of image forming work, it is detected by a first detection means 28 and the action of the device is stopped. At this time, when the recording paper 12 having an unfixed toner image is left in the fixing means 22, it is detected by a second detection means 30. When a carrying means 24 is controlled by a control means 34 so that the paper left in the device is carried to the fixing means 22 after the paper jamming or the like is eliminated, a paper supply means 14 and the carrying means 24 are controlled so that the deficient number of recording papers 12 is carried to the fixing means 22 from the oaoer supply means 14 in the case of judging that the number of residual papers passed through the fixing means 22 is fewer than a prescribed number of sheets based on the counted value of a count means 32 counting the number of residual papers passed through the fixing means 22.