Liquid ejection head

A liquid ejection head comprising an ejection device substrate having a substrate provided with an energy-generating element that generates energy for ejecting a liquid, a liquid supply member that supplies the liquid to the ejection device substrate, and a support member that is provided between the ejection device substrate and the liquid supply member and joined to the ejection device substrate and to the liquid supply member,

• wherein the support member has at least two liquid supply flow paths that are through-holes extending through the support member and has a projected portion or a depressed portion at a joint surface of the support member with respect to the liquid supply member, and
• wherein a spacing between two liquid supply flow paths adjoining each other at the joint surface of the support member with respect to the liquid supply member is larger than a spacing between the two liquid supply flow paths adjoining each other at a joint surface of the support member with respect to the ejection device substrate.