A method of manufacturing a liquid ejecting head and a supply member having a plurality of liquid supply passages is provided. The supply member includes first and second supply members in which liquid supply passages are provided and filters provided between the first supply member and the second supply member. The method includes: preparing a connected filter formed of a plurality of filter element portions corresponding to the plurality of liquid supply passages and a connecting portion that connects the plurality of filter element portions; in a state where the filter element portions of the connected filter are held between the first supply member and the second supply member, charging molten resin from a position corresponding to the connecting portion of the connected filter to separate the connecting portion; and, during the charging, molding.