Patent ID: 7938511

Claim:
A liquid ejection head comprising: an ejection port part for ejecting liquid; a heat generating element for generating heat energy used for ejecting liquid, the heat generating element being formed at a location directly opposed to the ejection port part; an energy effect chamber in which the heat generating element is located; a channel communicating with the energy effect chamber; and a liquid supplying port communicating with the channel and supplying liquid to the energy effect chamber, wherein the ejection port part includes a first ejection port part communicating with atmosphere and a second ejection port part having a cross-sectional area orthogonal to a direction in which liquid is ejected that is greater than that of the first ejection port part, the second ejection port part being located between the energy effect chamber and the first ejection port part, and wherein a center of the second ejection port part, in a liquid supply direction from the liquid supplying port to the energy effect chamber, is offset from a center of the heat generating element in the liquid supply direction toward a far-end side of the energy effect chamber in the liquid supply direction.