There is provided a separator for a fuel cell having a very good anticorrosiveness and electrical conductivity.A separator for a fuel cell according to the present invention includes: a base 1 formed of a steel which contains 10.5 mass % or more of Cr; a metal film 3 formed on the surface of the base 1; and an intermediate layer 2 formed between the base 1 and the metal film 3, the intermediate layer 2 containing oxygen. The metal film 3 is composed of at least one metallic element selected from the group consisting of Ta, Nb, and Ti, and the intermediate layer 2 contains Fe and Cr which are contained in the steel and at least one metallic element selected from the group consisting of Ta, Nb, and Ti composing the metal film 3.