Where double-side printing is effected on a single copying paper sheet to produce images of two originals thereon, the directions of images on the originals can be considered. Even where the directions of images on originals, which can be positioned only horizontally due to the structure of a copying machine, are the portrait and landscape, the printing according to the directions of images can be made. Even in the case of originals which can be positioned vertically and horizontally, the originals can be set (for input) in conformity to the direction of paper sheets set in the machine and the printing with regulated directions of images can be made by setting the directions of images. More specifically, even where a vertically positioned original is set horizontal for printing, the same printing result as in the case where it is set vertical can be obtained and the performance of the copying machine is enhanced.