A metal component for a fuel cell available as a separator disposed in contact with a second main surface of a plate-formed electrode which is disposed in contact with a polymer electrolyte film as an electrolyte on a first main surface thereof, having a regular rough on the main surface, opposing to said electrode, of a plate-formed and Au film preformed metal base composed of a metal less noble than Au, top portions of projected portions of said regular rough being brought into contact with said electrode, and recessed portions of said regular rough serving as a gas flow path through which a fuel gas or an oxidizer gas is supplied to said electrode, wherein said metal base has an Au film of 1 to 100 nm thick formed on both of the tip surface of said projected portions brought into contact with said electrode, and the main surface region other than said tip surface, wherein said metal base is composed of a material capable of producing at least an active potential range and a passive potential range in an anode polarization curve measured in a sulfuric acid solution of pH1 at 80° C., and showing an anode current density of 100 μA/cm2 or less in the passive potential region.