Separator for fuel cell and fuel cell containing the separator

A fuel cell comprising a fuel cell stack constructed by laminating power-generating units which includes an electrolyte or electrode integrated structure formed of an electrolyte and electrodes integrated together, a pair of gas diffusion layers disposed on opposite surfaces of said electrolyte or electrode integrated structure, and a pair of separators disposed outside said gas diffusion layers;

• electric collector plates disposed outside said fuel cell stack;
• and end plates disposed outside said collector plates, wherein the separator disposed between the plurality of power-generating units is comprised of an electrically conductive flat plate, and two flat plate shaped electrically conductive channel plates superposed on each other with said electrically conductive flat plate interposed therebetween;
• a plurality of manifolds for passing a reaction fluid to an adjacent cell are formed in said electrically conductive flat plate;
• through-channels for permitting the flowing the reaction fluid from each of said plurality of manifolds are formed in said two electrically conductive channel plates;
• any one of said two electrically conductive channel plates is formed so that the through-channels are partially overlapped with each of said plurality of said manifolds in said electrically conductive flat plate;
• and and the other electrically conductive channel plate has a portion protruded outwardly from an outer periphery of said electrically conductive flat plate, the through-channels being formed from a region contacting with said electrically conductive flat plate to said protruded portion.