An ink-jet head has a plurality of nozzle groups which respectively jet inks of a plurality of colors. Each nozzle group has a high density portion of small nozzle interval and two low density portions of larger nozzle interval than the high density portion. The high density portion is positioned between the low density portions. Because in accompaniment with a reciprocating movement of the ink-jet head, an intermediate area, in which inks from the two low density portions land in a mixed manner, is formed between two areas, in which inks from the high density portion land, color banding is made inconspicuous and lowering of the printing quality due to differences in color can be suppressed.