In an image forming apparatus, at the time of print recording of a set of image data to a plurality of recording sheets, by the use of a recording sheet interval that is an interval between a position where print recording of a recording sheet of the plurality of recording sheets ends and a position where print recording of a succeeding recording sheet starts, an image processing portion executes image processing of another set of image data read by a scanner portion and divided by an image dividing portion, in accordance with an operation command of a control portion.