Patent ID: 8313169

Claim:
A liquid-ejecting head comprising: a recording element substrate provided with an energy generating element that generates energy used to eject a liquid from a discharge port; a supporting member that supports the recording element substrate, the supporting member having at least one liquid chamber that supplies the liquid to the recording element substrate, a first supply port that is formed in one surface of the supporting member, the first supply port communicating with the at least one liquid chamber and being in fluid communication with the recording element substrate, and at least one second supply port that is formed in a surface opposite the one surface of the supporting member, the at least one second supply port communicating with the at least one liquid chamber; and a flow passage forming member that supplies the liquid to the at least one second supply port, wherein, the at least one second supply port that is smaller than the first supply port is formed at a position corresponding to one longitudinal end side of the first supply port, wherein a cross-section of the at least one liquid chamber perpendicular to a direction extending from the surface opposite the one surface of the supporting member toward the one surface of the supporting member gradually increases in part of the extending direction.