Patent ID: 7216955

Claim:
An inkjet printer comprising: a recording head for jetting a black ink, a recording head for jetting a cyan ink, a recording head for jetting a magenta ink, and a recording head for jetting a yellow ink, wherein an image is recorded on a recording medium by forming a plurality of lines by moving the recording heads which jet the black ink, the cyan ink, the magenta ink, and the yellow ink, respectively, over the recording medium that is conveyed along a conveyance direction, along a direction perpendicular to the conveyance direction; each of the recording heads comprises a plurality of nozzles for jetting the ink as minute liquid drops; the plurality of nozzles are arrayed at intervals of predetermined number of pixels along the conveyance direction in each of the recording heads; each nozzle of one recording head is arranged at a position shifted from each nozzle of the other recording head along the conveyance direction of the recording medium so as to dispose each nozzle of the one recording head within the interval of the predetennined number of pixels between the nozzles of the other recording head, and the plurality of nozzles are arranged such that, in the plurality of lines, ink color piling orders of pixels between adjacent lines are different from each other.