| 摘要 |
A liquid discharge head includes a liquid discharge substrate containing an energy generating element and a liquid discharge port, a flow path member of a resinous material fixed to the liquid discharge substrate and having at least a liquid supply path, a sealing material of a resinous material, a concave part, and a support substrate, wherein a distance L1 from a lateral face of the concave part of the flow path member to an end of the support substrate, a distance L2 from the lateral face of the concave part to a lateral face of the liquid discharge substrate, a linear expansion coefficient E1 of the flow path member and a linear expansion coefficient E2 of the sealing material satisfy a relation: L1×E1>L2×E2.
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