An image forming apparatus includes a selector for selecting a first mode in which a transparent toner image is partly formed on a surface of a recording material and a second mode in which the transparent toner image is formed so that whole surface of the recording material is coated with a transparent toner; and a controller for controlling execution so that execution of the first and second image forming modes are permitted when information indicates that the recording material has not been subjected to image formation before the recording material is placed to a placing portion and so that execution of the second mode is permitted but execution of the first mode is forbidden when the information indicates that the recording material has already been subjected to image formation before the recording material is placed to the placing portion.