An image forming apparatus includes a printing unit that executes print jobs in which images are printed on sheets; a sheet discharge tray that receives the printed sheets and partition sheets that partition the printed sheets; a transport unit that discharges the printed sheets and the partition sheets to the sheet discharge tray; a clock that measures the time; and a partition unit that controls the transport unit to discharge the partition sheet during the first interval between print jobs after a predetermined period of time based on the measurement results of the clock.