an image forming apparatus is disclosed which comprises an image forming member for forming a plurality of images onto one sheet , a setting member for setting the number of sheets to be formed with images and a control member for controlling the image forming member in order to execute formation of the images for the number of sheets which can be loaded in a tray . the image forming member has the tray for temporarily loading the sheet on which a part of the images has been formed and further forms another part of the images onto the sheet loaded in the tray , when the number of sheets which is set by the setting member is larger than the number of sheets which can be loaded in the tray a plurality of the above operations are repeated .