An image forming apparatus including a fixing unit; a discharge unit; a stacking unit; an inversion guide; a cooling fan; an opening; a duct; and a second duct, wherein the discharge unit is provided on a downstream side of the side end of the fixing unit in a paper discharge direction, and an air flow direction from the duct toward the second duct is substantially matched with a direction in which hot air above the fixing unit is taken in by the cooling fan.