Method for producing separator

A method for producing a separator, the method comprising:

• a first process of forming, in each of two flat plate-shaped bases, a flow path of gas for causing generation of electrical energy, and a bead having a top on which a gasket is provided;
• and
• a second process of joining the two bases after the completion of the first process,
• wherein the first process comprises, for a base that is any one of the two bases:
• a process of forming, in the base, first protrusions corresponding to the flow path by carrying out press molding;
• a process of forming a surface layer on a surface of the base in which the first protrusions are formed;
• a process of providing the gasket in a flat plate-shaped bead formation region in the base on which the surface layer is formed, the flat plate-shaped bead formation region being provided with the bead;
• and
• a process of forming, in a section in which the gasket is provided, a second protrusion corresponding to the bead.