Patent ID: 8356886

Claim:
A liquid ejection head comprising: a first flow channel member and a second flow channel member, wherein the first flow channel member and the second flow channel member are disposed so as to form a liquid supply flow channel configured to supply liquid to an ejection port configured to eject liquid, a supply and discharge flow channel communicated with a supply port from the outside and a discharge port to the outside, and a communicating flow channel configured to communicate the supply and discharge flow channel to the liquid supply flow channel; and a seal member formed of an elastic material, wherein the seal member constitutes a part of the supply and discharge flow channel and connects the first flow channel member to the second flow channel member in a water-tight manner, wherein the communicating flow channel is communicated with the supply and discharge flow channel via a filter disposed in the interior of the second flow channel member, and wherein the supply and discharge flow channel comprises a partial flow channel extending from the supply port to the discharge port, and a branch flow channel branching at a first position from the partial flow channel, passing through an area opposing the filter, and joining the partial flow channel at a second position closer to the discharge port than the first position.