An image forming apparatus includes: a memory buffer that has a plurality of band buffers for storing band data in which image data is divided into a plurality of bands; a data processing unit that performs a specific process with respect to the band data stored in the memory buffer; a storage unit having a storage area that store image data of a plurality of pages of an original of a specific size, storing processed band data that has been subjected to the specific process by the data processing unit into the storage area and, outputting a plurality of pieces of the processed band data stored in the storage area; and an output processing unit that performs a print process based on the plurality of pieces of the processed band data that is output from the storage unit.