used however recording head cartridges having different orifice diameters may be combined all the ink colors do not always require light and deep inks the number of kinds of inks may be increased decreased according to the image required furthermore the recording head used in the embodiments discharges an ink upon production of bubbles by heat energy however the present invention is not limited to this for example the present invention may be applied to a recording head for discharging an ink using e g a piezoelectric element as can be seen from the above description according to the present invention inks to be jetted on a recording medium can overlap each other in the order of higher ink densities and the distance between discharge ports for discharging inks having different densities can be shortened thus the discharge separation of inks having different densities can be reduced as a result a high resolution high gradation image free from graininess by the density multi value recording system can be recorded since the discharge separation is reduced the capacity of the buffer memory can be decreased and total cost of the apparatus can be reduced since the cartridges are integrated variations in head discharge position can be reduced and handling property of the cartridges can be improved another embodiment of the present invention will be described below with reference to fig1.