In a method of manufacturing an ink-jet recording head including plural recording element substrates having at least one nozzle array comprising nozzles to eject ink, an electric wiring member supplying signals to the recording element substrates, a member supporting the recording element substrates and the electric wiring member, electric connecting portions electrically interconnecting the recording element substrates and the electric wiring member, and a sealant sealing the electric connecting portions, the method comprises the steps of applying sealants to the supporting member including the recording element substrates, the electric wiring member, and the electric connecting portions, and curing the sealants, measuring a distance between reference positions set on each recording element substrate before and after the curing of the sealants, and mounting the recording element substrates to the supporting member depending on a difference in the distance between the reference positions measured before and after the curing of the sealants.