A fuel cell includes a solid polymer electrolyte membrane and cathode and anode catalyst layers held between a fuel electrode substrate having a surface area larger than that of the cathode catalyst layer and an oxidizer electrode substrate having a surface area larger than that of the anode catalyst layer. The fuel electrode substrate includes a fuel-sealing support portion surrounding the cathode catalyst layer. The oxidizer electrode substrate includes an oxidizer-sealing support portion surrounding the anode catalyst layer. The fuel-sealing and oxidizer-sealing support portions each include pores partially or wholly filled with a resin. The fuel-sealing support portion is bonded to the membrane by the resin at a position closer to an outer edge of the membrane than is the cathode catalyst. The oxidizer-sealing support portion is bonded to the membrane by the resin at a position closer to the outer edge of the membrane than is the anode catalyst.