An electrode sheet (489) is put in one side of a solid electrolyte membrane (114) at its cut portion. A base member (110) for an oxidant electrode side current collector electrode sheet (499) is placed at a location facing a base member (104) for the electrode sheet (489) formed on one face of the solid electrolyte membrane (114). In addition, the base member (104) for a fuel electrode side current collector electrode sheet (497) is placed at a location facing the base member (110) formed on the other face of the electrolyte film (114).