Patent ID: 6874863

Claim:
A liquid ejection head comprising: a plurality of liquid ejection units each of which includes a flow path unit formed by a laminated structure provided with a nozzle plate on which a nozzle array aligning nozzle openings is formed, a flow path forming plate in which a pressure generating chamber communicating with the nozzle opening, and a sealing plate for closing an opening of the pressure generating chamber; and a head holder to which said liquid ejection units are attached for guiding a liquid from a liquid supply source; wherein said liquid ejection units includes at least two of first liquid ejection units that are aligned so that the respective nozzle arrays are aligned in a first direction, and each of which has a first length in the first direction, a second liquid ejection unit having a second length in the first direction shorter than the first length, the second liquid ejection unit is arranged at a discontinuous portion of the nozzle arrays between two adjacent ones of the first liquid ejection units in a state of being shifted from an alignment of the first liquid ejection units in a second direction, whereby a single unit of the liquid ejection units is constituted by the first liquid ejection units and at least one of the second liquid ejection unit such that the respective nozzle arrays constitutes a single nozzle group for ejecting the same kind of a liquid.