Patent ID: 8403450

Claim:
A liquid ejection head comprising: a flow channel unit including a nozzle plate provided with nozzle rows formed of a plurality of nozzles, and a flow-channel-containing substrate having pressure chambers communicating with the nozzles and a reservoir configured to supply liquid into the pressure chambers and formed on the side of a side surface of the nozzle plate with respect to the nozzle row, the nozzle plate and the flow-channel-containing substrate being laminated, a head case formed with a common liquid flow channel configured to supply the liquid to the reservoir and joined to the flow-channel-containing substrate on the side opposite from the nozzle plate; a heater configured to heat the nozzle plate; a head cover heated by the heater and formed with a bottom surface portion opposing the nozzle plate on the side opposite from the head case, wherein a distal end of the head cover comes into abutment with a portion between an area of the nozzle plate corresponding to the reservoir and an area formed with the nozzle row, and a void is formed between the area of the nozzle plate corresponding to the reservoir and the head cover.