Patent ID: 8385765

Claim:
An image forming apparatus capable of selectively discharging a sheet having an image formed with toner on one surface thereof and a sheet having images formed with toner on both surfaces thereof, the image forming apparatus comprising: a transfer portion configured to transfer a toner image on a sheet; a fixing unit configured to fix the toner image on the sheet; a sheet stacking portion configured to stack sheets each having the toner image fixed thereon; and a control portion configured to set a maximum sheet stacking amount of sheets each having a different toner image, wherein the control portion sets the maximum sheet stacking amount of sheets each having the different toner image so that the maximum sheet stacking amount, which is set when sheets having the toner images formed on both surfaces thereof are stacked, is smaller than the maximum sheet stacking amount, which is set when sheets each having the toner image formed on one surface thereof are stacked.