Solid polymer electrolyte membrane electrode assembly and solid polymer electrolyte fuel cell using same

A solid polymer electrolyte membrane electrode assembly (cell) (10) comprising a fuel electrode membrane (12) disposed on one surface of a solid polymer electrolyte membrane (11), and an oxidant electrode membrane (13) disposed on the other surface of the solid polymer electrolyte membrane (11), and wherein ions of at least one metal of Ce, T1, Mn, Ag and Yb are contained in the solid polymer electrolyte membrane (11) or the oxidant electrode membrane (13) and the fuel electrode membrane (12) of the cell (10); and a solid polymer electrolyte fuel cell using the cell (10).