In an image forming apparatus, a calculation processing portion includes an input portion and an input-portion abnormality determining portion. The input portion is connected to a temperature detection portion. When an abnormality detection circuit has detected that a temperature detected by the temperature detection portion is an abnormally heated temperature, the input-portion abnormality determining portion determines whether or not a first temperature calculated as a temperature of a fixing member is lower than a predetermined second temperature, and upon determining that the first temperature is lower than the second temperature, determines that the input portion is abnormal.

An image forming apparatus includes a selector configured to select a first mode for forming an image on a first recording material including a first side which is closed, a second side which is closed, a third side which is open, and a fourth side which is open, a placement portion on which the first recording material is to be placed, an image former configured to form an image on the first recording material conveyed from the placement portion, and a display, wherein the display is configured to display, in a case where the first mode is selected by the selector, a message prompting a user to place the first recording material on the placement portion so that a leading edge side of the first recording material in a conveyance direction becomes the first side.