There is described an image forming apparatus, which makes it possible to
form a lining cover sheet image at an appropriate position of the lining
cover sheet, irrespective of change of the lining cover sheet width. The
apparatus includes a lining cover-sheet width acquiring section to
acquire a lining cover-sheet width; a cover-sheet image data acquiring
section to acquire various cover-sheet image data sets; a cover-sheet
image data arranging section to arrange the front cover-sheet image data
and the rear cover-sheet image data in such a manner that they are
arranged at an interval of the lining cover-sheet width, and to arrange
the lining cover-sheet image data in such a manner that a lining image
center line coincides with a cover sheet center line, in its width
direction; and an image forming section to form the total cover sheet
image, based on the arranged image data.