The fuel cell includes a membrane electrode assembly, an anode gas diffusion layer, and a cathode gas diffusion layer, and a pair of separators sandwiching the laminate of these, is formed of a thermosetting resin is disposed between the separator surrounding an outer periphery of the laminate Te and a frame body. At least one of the gas diffusion layer of the anode gas diffusion layer and the cathode gas diffusion layer is formed of a composite material of thermoplastic resin and conductive particles, in a state in which the laminated body is not sandwiched with a predetermined pressure by a separator, the frame than one opposing surfaces of the pair of separators has a protrusion that protrudes in a state where the laminate is sandwiched with a predetermined pressure by a separator, the protrusion is pressed by one of the pair of separators, at least one It is in contact with the frame and the gas diffusion layer is deformed.