Provided is a method for producing a fuel cell separator, capable of easily roughening the surface of a sheet-like metal substrate to become a fuel cell separator and thus reducing the contact resistance of the resulting fuel cell separator. Specifically, the method is a method for producing a fuel cell separator from a sheet-like metal substrate, including pulling the metal substrate at least in one direction to plastically deform the metal substrate, thereby increasing the arithmetic average roughness Ra of the surface of the metal substrate after being pulled compared to that before being pulled.