Patent ID: 7164436

Claim:
A liquid ejection apparatus, comprising: a plurality of liquid cartridges, each of which includes a liquid container and a pressure chamber, the liquid container having a flexible portion and storing liquid therein, and the pressure chamber applying pressure to the flexible portion of the liquid container; a liquid ejection head, which ejects the liquid; a plurality of liquid flow paths, which communicate the liquid containers with the liquid ejection head; and an air supply member, which supplies pressurized air to the pressure chambers for compressing the flexible portions so as to supply the liquid from the liquid containers to the liquid flow paths, wherein the air supply member includes: a distribution member, which has an air intake portion for introducing the pressurized air, and a plurality of air outlet portions for distributing the pressurized air to the liquid cartridges; and a plurality of branch flow paths, which respectively communicate the air outlet portions with the pressure chambers of the liquid cartridges, wherein the distribution member includes a distribution flow path which communicates the air intake portion with the air outlet portions; and wherein the distribution flow path includes an air groove, formed in a flow path formation member, and a first flexible member which seals the air groove.