Patent ID: 7591531

Claim:
A liquid ejection head comprising: an orifice plate comprising an arrangement of a plurality of ejection ports through which a liquid is ejected; a substrate comprising an energy generating element generating energy utilized to eject the liquid; a liquid supply port through which the liquid is supplied to the energy generating element; pressure chambers each communicating with a corresponding one of the ejection ports and including the energy generating element; channels each communicating with a corresponding one of the pressure chambers and; a common liquid chamber communicating with the channels and the liquid supply port, wherein the liquid supplied to the channels through the liquid supply port is ejected in a direction orthogonal to the substrate in conjunction with driving of the energy generating elements, the plurality of channels are each connected to the corresponding pressure chamber at an opposite position with respect to the pressure chamber, the liquid supply port is arranged so as to be located over a range of the row of ejection ports in the direction which the row of ejection ports extends so that the liquid supply port is located at a position corresponding to the plurality of channels along a direction in which the plurality of ejection ports is arranged, and at least one side of each of the plurality of channels is connected to the liquid supply port via the common liquid chamber.