Patent ID: 7980678

Claim:
An ink jet recording head comprising: a substrate having a discharge port forming member provided with discharge ports for discharging ink, and a flow path forming member for forming an ink flow path communicating with the discharge ports, wherein at least one of the flow path forming member and the discharge port forming member contains a material having fluorine atoms; a supply path which is a part of an ink path communicating with the ink flow path and is used to supply ink to a supply hole; a support member for forming a part of the supply path and supporting the substrate; a supply path forming member for forming a part of the supply path; and a rubber member which is provided between the support member and the supply path forming member and forms a part of the supply path, wherein the supply path forming member or the rubber member contains a material containing bivalent metal, and the rubber member contains a compound providing counter ions to the bivalent metal.