A separator having a separator member coupled body having a metal plate as a base body, and formed by integrally coupling a plurality of separator members each having through holes for feeding fuel to an electrolyte of the fuel cell, the through holes arranged so as to correspond to the unit cell and to be perpendicular to a surface of the base body, and frame coupled bodies each made of an insulating material, each having openings for fuel feeding or oxygen feeding corresponding to the respective separator members, and each formed by integrally coupling a plurality of frame portions that give insulation between the unit cells, wherein the frame coupled bodies, making a pair, sandwich the separator member coupled body from its both sides, and each frame portion of one of the frame coupled bodies is capable of fitting a membrane electrode assembly of the fuel cell into the opening.