Patent ID: 8876260

Claim:
A liquid ejection head comprising: a plurality of recording element substrates that each include an energy generating element that generates energy utilized for ejecting a liquid, the plurality of recording element substrates each having a supply port through which the liquid is supplied to the energy generating element; a plurality of support members that each have a flow passage that communicates with a corresponding one of the supply ports, the support members each supporting a corresponding one of the plurality of recording element substrates, wherein heat insulation layers are provided on inner side surfaces of each flow passage; a base substrate that supports the plurality of support members; and a plurality of heat insulating members disposed between the flow passages and the base substrate, wherein an individual heat insulating member corresponds to a recording element substrate, wherein a thermal conductivity of the support members is equal to or greater than a thermal conductivity of the recording element substrates, and wherein a thermal conductivity of the heat insulating member is less than a thermal conductivity of the base substrate.