A printing apparatus comprising: printing means which includes holding means for holding a first printing head on which a discharge port array consisting of a plurality of discharge ports for discharging ink arranged in a predetermined direction is arranged and a second printing head on which a discharge port array consisting of a plurality of discharge ports for discharging ink arranged in the predetermined direction is arranged, the first printing head and the second printing head being arranged so as to be separated from each other in an intersection direction intersecting with the predetermined direction; scanning means configured to scan a print medium by alternately moving the printing means forward and backward in the intersection direction; and control means configured to control discharge of ink while causing the scanning means to execute scanning in such a manner that printing on a first area of the print medium is executed by using the first printing head without using the second printing head and printing on a second area different from the first area in the intersection direction of the print medium is executed by using the second printing head without using the first printing head, wherein a first plurality of discharge port arrays for discharging a plurality of different color inks is arranged on the first printing head in a same arrangement order in the intersection direction as a second plurality of discharge port arrays for discharging the plurality of different color inks that is arranged on the second printing head, wherein the first and the second printing heads are mounted on the printing means in such a manner that said arrangement orders of the first and second plurality of discharge port arrays in the intersection direction are opposite from each other; each discharge port array of the first plurality of discharge port arrays and of the second plurality of discharge port arrays is divided into a plurality of discharge port groups (205, 206); and the control means is adapted to control the discharge of ink to a unit area included in the first area and the second area, respectively, in such a manner that an image is printed on the unit area in multiple passes of the first printing head and the second printing head, respectively, by discharging ink from the first plurality of discharge port arrays and the second plurality of discharge port arrays, respectively, through a plurality of times of scanning executed by the scanning means, wherein the control means controls the discharging of ink from each discharge port array for printing the image on the unit area such that in mutually different passes among the multiple passes ink is discharged from mutually different discharge port groups of that discharge port array. printing means which includes holding means for holding a first printing head on which a discharge port array consisting of a plurality of discharge ports for discharging ink arranged in a predetermined direction is arranged and a second printing head on which a discharge port array consisting of a plurality of discharge ports for discharging ink arranged in the predetermined direction is arranged, the first printing head and the second printing head being arranged so as to be separated from each other in an intersection direction intersecting with the predetermined direction; scanning means configured to scan a print medium by alternately moving the printing means forward and backward in the intersection direction; and control means configured to control discharge of ink while causing the scanning means to execute scanning in such a manner that printing on a first area of the print medium is executed by using the first printing head without using the second printing head and printing on a second area different from the first area in the intersection direction of the print medium is executed by using the second printing head without using the first printing head, wherein a first plurality of discharge port arrays for discharging a plurality of different color inks is arranged on the first printing head in a same arrangement order in the intersection direction as a second plurality of discharge port arrays for discharging the plurality of different color inks that is arranged on the second printing head, wherein the first and the second printing heads are mounted on the printing means in such a manner that said arrangement orders of the first and second plurality of discharge port arrays in the intersection direction are opposite from each other; each discharge port array of the first plurality of discharge port arrays and of the second plurality of discharge port arrays is divided into a plurality of discharge port groups (205, 206); and the control means is adapted to control the discharge of ink to a unit area included in the first area and the second area, respectively, in such a manner that an image is printed on the unit area in multiple passes of the first printing head and the second printing head, respectively, by discharging ink from the first plurality of discharge port arrays and the second plurality of discharge port arrays, respectively, through a plurality of times of scanning executed by the scanning means, wherein the control means controls the discharging of ink from each discharge port array for printing the image on the unit area such that in mutually different passes among the multiple passes ink is discharged from mutually different discharge port groups of that discharge port array.