Patent ID: 7802869

Claim:
An inkjet printer comprising: a printing head having a plurality of discrete nozzle units each including a nozzle array in which a plurality of nozzles are arranged in a nozzle array direction; a main scanning control unit configured to make the printing head scan in a main scanning direction substantially perpendicular to the nozzle array direction while the nozzle units discharge ink drops; a sub scanning control unit configured to relatively move the printing head with respect to the medium in a sub scanning direction substantially perpendicular to the main scanning direction; and a printing pass setting unit configured to correlate each of the nozzles with each of multiple printing passes to be printed at once by a scanning of the printing head in the main scanning direction, and configured to set discharging nozzles among the nozzles to discharge ink drops to the printing passes so as to not overlap boundaries of the printing passes with boundaries of the nozzle units.