Patent ID: 8342645

Claim:
A printing apparatus comprising: a printing unit configured to print on a printing medium by scanning a printhead having a plurality of nozzle arrays in a first direction and a second direction opposite to the first direction, a holding unit configured to hold information regarding an air flow in the scan of the first direction and in the scan of the second direction; and a changing unit configured to change discharge speeds of ink from the plurality of nozzle arrays based on the information regarding the air flow that is held in said holding unit and a scanning direction of the printhead, wherein the printing apparatus has a structure in which an air flow entering the nozzle array in the scan of the printhead in the first direction becomes larger than an air flow entering the nozzle array in the scan of the printhead in the second direction, and in scanning in the second direction, said changing unit increases the discharge speed of ink discharged from at least one nozzle array arranged leeward in the scanning direction of the printhead from a predetermined position on the printhead in the scanning direction to be higher than or equal to the discharge speed of ink discharged from at least one nozzle array arranged windward in the scanning direction of the printhead from the predetermined position.