Patent ID: 8622522

Claim:
A liquid ejection head comprising: a plurality of arrays of elements which are formed on one side of a board, which generate energy that is used to eject a liquid, and which are arranged in a first direction; a plurality of arrays of ejection openings for ejecting liquid which are arranged such that the ejection openings correspond to a plurality of the elements; and a plurality of arrays of supply ports for supplying the liquid to the elements which pierce through the one side and another side of the board and which are arranged in the first direction, wherein the plurality of arrays of supply ports and the plurality of arrays of elements are alternately arranged in a second direction which intersects with the first direction, the plurality of arrays of supply ports include a first array of supply ports arranged at a side of an end of the board in the second direction and a second array of supply ports arranged at a side of a center of the board in the second direction, and a volume of the board between two adjacent supply ports in the first array of supply ports is greater than a volume of the board between two adjacent supply ports in the second array of supply ports.