Patent ID: 7901022

Claim:
A printing apparatus which prints in columns and lines by using an inkjet head having a nozzle array formed by arraying a plurality of nozzles for discharging ink while scanning the inkjet head on a printing medium, the printing apparatus comprising: storage means for storing a position of an abnormal nozzle which abnormally discharges ink among the plurality of nozzles arrayed in the nozzle array; and control means for assigning data subjected to discharge by the abnormal nozzle to at least two normal nozzles positioned on one side of the abnormal nozzle and at least two normal nozzles positioned on an opposite side of the abnormal nozzle, in accordance with predetermined priorities and making each normal nozzle to which data, subjected to discharge by the abnormal nozzle, has been assigned discharge ink corresponding to the assigned data to a position which is different from a position to which ink corresponding to the data subjected to discharge by the abnormal nozzle should be discharged, wherein the priorities are set in a matrix having a plurality of columns and a plurality of lines of raster and are different for each column in the matrix.