An image forming apparatus including an image receiving sheet transport system in which a photosensitive sheet and an image receiving sheet are pressed together to form an image on the image receiving sheet which is then transported to a glosser unit at a slower speed than the transporting speed of the image receiving sheet by a pressure developing device and the glosser unit, the image receiving sheet being temporarily buckled between the pressure developing device and the transport device, and then being taken up by the glosser unit. The image receiving sheet is smoothly pulled by a one-way clutch in the direction in which it is stretched.