To properly discharge extra tab sheets without placing the burden of removing the extra tab sheets on a user even when attaching tab sheets into sheets to be subjected to reverse-order printing.

The printing device adds a plurality of the tub sheets forming one set at a predetermined position of a printed article where recording sheets of N (N is one or more natural number) per one copy is discharged by executing a print job. A number of the tab sheets to be attached to the printed article of one copy of the print job is specified. When the printed articled of one copy of the print job is printed, after discharging the extra tab sheet corresponding to difference between the number of sheets specified by a specifying means and a number of the tab sheets forming one set, the printed article of the print job is discharged from an N-th sheet.