In the case to print an image of a set page that sets a plurality of combine pages, it is possible to adjust an arrangement position of the combine pages without changing the direction of the combine pages and raising a reduction rate. In the print section, a reduction rate selection scene display section 110 is configured to display a selection scene for selecting a vertical sheet number and a horizontal sheet number of the combine pages arranged in the set page on a displaying section 40; an image forming and processing section 120 generates combine pages in a reduction rate that is selected by the reduction rate selection scene display section 110; and a set page generation section 130 generates a set page by arranging the combine pages.