FUEL CELL SEPARATOR AND FUEL CELL DEVICE

An object of the present disclosure is to provide a fuel cell separator having a low contact resistance due to a tin oxide film and having an excellent corrosion resistance. An embodiment is a method for manufacturing a fuel cell separator including a stainless steel substrate. The method includes forming the tin oxide film on a surface of the stainless steel substrate; and attaching phosphoric acid or phosphate to at least a defective portion in the tin oxide film.