An original processing apparatus capable of enhancing original processing ability even in the case of continuously processing a plurality of originals. In a first processing unit of the original processing apparatus, MICR characters on an original conveyed along a conveying path are read and an image of a front side of the original is read. The original is then conveyed to a position short of a second processing unit, and the next original is fed to the conveying path. When control information including print information is created based on a result of the processing by the first processing unit, the original positioned short of the second processing unit is conveyed to the second processing unit where print information is printed on the original and an image of a back side of the original is read.