Patent ID: 8197987

Claim:
A separator for a fuel cell, the fuel cell comprising an electrolyte with ionic conductivity, a pair of electrodes with the electrolyte sandwiched therebetween, and the separator for individually supplying a fuel gas and an oxidizing agent gas to the pair of the electrodes, respectively, the separator comprising: a multilayered metal sheet with at least an outermost layer, and a corrosion-resistant film covering a whole surface of the metal sheet in order to form a metal separator, wherein the metal separator is provided with a reacting gas rectification unit for changing a flow direction of a reacting gas flown from a central part of the metal separator to a periphery thereof and supplying the reacting gas from the periphery of the metal separator to the central part thereof again, a reacting fuel gas manifold, a reacting gas manifold junction unit which is disposed between the reacting fuel gas manifold and the electrodes, and a reacting gas sealing unit, on the periphery of the metal separator respectively, and the metal separator is further provided with the reacting gas sealing unit, the reacting gas manifold junction unit, and the reacting gas rectification unit, formed of an elastic body, respectively, wherein the elastic body used for the reacting gas sealing unit formed in the metal separator differs in hardness from the respective elastic bodies used for the reacting gas manifold junction unit and the reacting gas rectification unit formed in the metal separator.