Patent ID: 7025438

Claim:
An ink-jet printing head having a plurality of nozzles through which said printing head ejects ink droplets of the same color while moving in a scanning direction, wherein said nozzles include a plurality of first nozzles through which ink droplets of a predetermined volume are ejected and a plurality of second nozzles through which ink droplets of a predetermined volume less than that of ink droplets ejected through said first nozzles are ejected, the number of said plurality of second nozzles is larger than the number of said plurality of first nozzles, at least one of said second nozzles has a center thereof located on a first imaginary line extending in the scanning direction through a center of one of said first nozzles, said second nozzles located within a predetermined distance from the first imaginary line constitute one group, said second nozzles constituting the group are located between two of said first nozzles, and each of said second nozzles constituting the group has a center thereof located on the first imaginary line.