An image forming apparatus allowing a printing section inside of a casing to print paper and discharging the printed paper from the casing through a discharge port of the casing includes a discharge tray configured such that the position thereof is switchable from a placement position for covering the surface of a feeding belt and receiving the paper discharged from the casing to an exposure position for exposing the surface of the feeding belt, and vice versa, wherein a surface of the discharge tray has a coefficient of friction lower than the surface of the feeding belt.