A fuel cell includes a membrane electrode assembly and first and second separators in the form of meal plates for sandwiching the membrane electrode assembly. An anode of the membrane electrode assembly has a gas diffusion layer, and a cathode of the membrane electrode assembly has a gas diffusion layer. Each of the gas diffusion layers includes a foamed member made of metal material such as stainless steel. Resinous flow field walls are provided in the foamed member by impregnation for forming a reactant gas flow field.

 
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