TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The pore-forming material comprises a first inorganic oxide. The first inorganic oxide is an oxide of at least one zirconium (Zr), titanium (Ti), tantalum (Ta), ruthenium (Ru), silicon (Si), aluminum (Al), tin (Sn), hafnium (Hf), germanium (Ge), gallium (Ga), indium (In), cerium (Ce), niobium (Nb), tungsten (W), molybdenum (Mo), chromium (Cr), boron (B) and vanadium (V). The first inorganic oxide is a mixed inorganic oxide comprising particles of Y1 oxide comprising at least one element of W, Mo, Cr, B and V, and a support of X oxide comprising at least one element of Zr, Ti, Ta, Ru, Si, Al, Sn, Hf, Ge, Ga, In, Ce, Nb, W, Mo, Cr, B and V on which the particles are supported. The inorganic oxide is an oxide of at least one element of Zr, Ti, Ta, Ru, Si, Al, Sn, Hf, Ge, Ga, In, Ce, Nb, W, Mo, Cr, B and V. The laminated body has 5-1000 respectively of the first and second layers. The catalyst material is an alloy comprising a noble metal element, and at least one element W, Hf, Si, Mo, Ta, Ti, Zr, Ni, Co, Nb, V, Sn, Al, Cr, Fe and Mn. The catalyst layer comprises an inorganic oxide and the inorganic oxide is particles having an average diameter of 0.5-3 nm. Preferred Method: The method further comprises forming the first layers by sputtering or vapor deposition with a inorganic oxide together with the catalyst material, a content of the inorganic oxide of which per first layer being equivalent to a content of a flat layer with a thickness of 0.3-20 nm which consist of the inorganic oxide solely, and forming pores by removing the inorganic oxide in the first layers by solubilization. EXAMPLE - Toray060 (RTM: Carbon paper) supporting a carbon layer having a thickness of 5-50 mu m. A first layer, i.e., a catalyst material-containing layer or a layer comprising a catalyst material and an inorganic oxide, was prepared by sputtering using a catalyst material target or a catalyst material target together with an oxide material target. The catalyst material content per layer in the first layer was an equivalent to a content of a flat layer consisting of the catalyst material and having a thickness of 0.3-4 nm. The inorganic oxide content per layer in the first layer was equivalent to a content of a flat layer consisting of the inorganic oxide and having a thickness of 0.5-20 nm. Second layer, i.e., a layer comprising a pore-forming material, was formed on the first layer by sputtering using a pore-forming material target. The average thickness per layer of the second layer was 10-500 nm. The first layer was formed by the same manner of the first step except that the first layer was formed on the second layer. The second and third steps were repeated until the total amount of platinum-ruthenium reached 1 mg/cm2, to give a laminated body. The laminated body thus prepared was immersed in 10 wt.% sulfuric acid at 80 degrees C for 2 hours for acid treatment. Then, the film was washed with purified water and dried, to give a catalyst layer-supporting substrate.