Patent ID: 8287092

Claim:
A printing head comprising: a first ejection opening array group in which first ejection opening arrays including a plurality of ejection openings, from which a first volume of ink having a first color is ejected, are formed on both sides of a supply port for supplying the ink to the first ejection opening arrays; a second ejection opening array group in which second ejection opening arrays including a plurality of ejection openings, from which a second volume of ink having the first color is ejected, are formed on both sides of a supply port for supplying the ink to the second ejection opening arrays, the second volume being greater than the first volume; a third ejection opening array group in which third ejection opening arrays including a plurality of ejection openings, from which the first volume of ink having a second color is ejected, are formed on both sides of a supply port for supplying the ink to the third ejection opening arrays; and a fourth ejection opening array group in which fourth ejection opening arrays including a plurality of ejection openings, from which the second volume of ink having the second color is ejected, are formed on both sides of a supply port for supplying the ink to the fourth ejection opening arrays, wherein the first ejection opening array group, the third ejection opening array group, the fourth ejection opening array group and the second ejection opening array group are arranged in this order, in a direction that intersects a direction along which the plurality of ejection openings of each of the first ejection opening arrays are arranged.