A fuel cell is provided with: a membrane electrode assembly including an electrolyte membrane and electrode layers disposed on both sides of the electrolyte membrane; and first and second separators formed by working a metallic plate and disposed so as to sandwich the membrane electrode assembly therebetween. The separators have an opening that constitutes a reactive gas flow path approximately perpendicular to the surface direction of the membrane electrode assembly at a position outside the position opposite to the membrane electrode assembly. The first separator has a folded portion formed by folding, to the membrane electrode assembly side, at least a part of the metallic plate at the position at which the opening is formed, using a side on the membrane electrode assembly side of the opening as a fold line. The folded portion has a communication hole through which an inner flow path space that is formed between the folded portion and the first separator and communicates with the end surface of the membrane electrode assembly and the reactive gas flow path communicate with each other. The second separator does not have the folded portion.
