When two or more sheets of images, which have been read from two or more sheets of originals are printed on a single sheet of first printing paper, original information related to the originals is stored into an IC chip attached to the first printing paper. Thereafter, when a user desires to reproduce the originals by using this first printing paper, the original information stored in the IC chip is read therefrom. Based on the read original information, the images read from the originals are printed respectively in the same sizes as those of the respective originals.