A discharge failure nozzle, which cannot print, can be complemented by a printable discharge nozzle according to a simple, low-cost method capable of a high-speed process. A printing apparatus, which prints by using an inkjet head having nozzle arrays formed by arraying a plurality of nozzles for discharging ink while scanning the inkjet head on a printing medium, includes a storage unit which stores the position of an abnormal nozzle that abnormally discharges ink among the plurality of nozzles arrayed in the nozzle arrays, an assignment unit which assigns data subjected to discharge by the abnormal nozzle to a plurality of normal nozzles positioned near the abnormal nozzle in a nozzle array including the abnormal nozzle in accordance with predetermined priorities, and a control unit which controls to perform assignment of data subjected to discharge by the abnormal nozzle every time column data along the scanning direction are created by a predetermined number of columns.