An image forming apparatus is provided with an orientation setting part for setting a readable orientation of a document that enables an operator of the image forming apparatus to readily read and understand an image on the document when carrying out an image forming process to form the image on a recording medium, a folding direction setting part for setting a folding direction in which a Z-fold of the recording medium is to be made after the image forming process, and a Z-fold part for forming the Z-fold on the recording medium, based on the readable orientation and the folding direction.