NOVELTY - A proton conductive material (100) comprises hollow inorganic fine particles (2) that have through holes on its surface, and that are filled with an electrolyte resin (1).    USE - For solid polymer electrolyte fuel cell.    ADVANTAGE - The proton conductive material has ion exchange capacity of greater than or equal to 0.5 meq/g, average particle size of 0.1-10 mu m. The proton conductive material provides increased proton conduction capacity without losing mechanical properties or shape. The proton conductive material improves water retention ability, water dischargeability, gas diffusability of the anode electrode, and improves power generation performance of the membrane-electrode assembly.    DETAILED DESCRIPTION - A proton conductive material (100) comprises hollow inorganic fine particles (2) that have through holes on its surface, and that are filled with an electrolyte resin (1). The electrolyte resin has a Si-O skeleton. The inorganic fine particles are SiO2. INDEPENDENT CLAIMS are included for following:    (1) manufacturing a proton conductive material involving mixing a monomer having one of a sulfonic acid group and a sulfonic acid precursor group in a dispersion liquid in which hollow inorganic fine particles that have through holes on a surface of the hollow inorganic fine particles are dispersed in a solvent; loading the monomer into the inorganic fine particles under a reduced pressure; polymerizing the monomer after the monomer has been loaded; and when the monomer having the sulfonic acid precursor group is used, converting the sulfonic acid precursor group into a sulfonic acid group after loading or polymerizing the monomer; and    (2) a membrane-electrode assembly having the proton conductive material comprising an anode electrode having an anode catalyst layer, provided on one surface side of a solid polymer electrolyte membrane; and a cathode electrode having a cathode catalyst layer, provided on the other surface side of the solid polymer electrolyte membrane, where at least the anode catalyst layer from among the pair of catalyst layers contains the proton conductive material.    DESCRIPTION OF DRAWING(S) - The figure shows cross-sectional view of a powdered proton conductive material.    Electrolyte resin (1)    Inorganic fine particle (2)    Proton conductive material (100)