PURPOSE: To economically output image information without bringing it reduction processing by providing a means for dividing the image information into plural areas of the number of picture elements determined in advance on an image output device and dividing the image information exceeding an outputtable size owned by itself into plural pieces in accordance with the number of outputtable picture elements determined in advance.

CONSTITUTION: Image information of an A1 size generated by editing an image is outputted to an A3 image printer 14, but in this case, the image information of the A1 size is divided into four areas of an A3 size, respectively of A, B, C and D, and outputted successively from the A3 image printer 14. It is realized by a fact that a read address counter 16 controls a read-out address of an image memory 13 by an instruction from a control part 17. In order to output an A area first, the read address counter 16 generates successively an address extending from a start address (a) of the A area to (b). Thereafter, an address (c) is generated, and subsequently, the address of the A area is generated up to (e).