TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Film: The material of microporous oxide film is silica, alumina, zirconia or titania. The oxide film is produced using surfactant as template. The composite material has regular pore structure. Preferred Material: The porous base material is porous metal or porous ceramic, such as ( alpha )-ceramics. Preferred Properties: The mean pore diameter of oxide film is less than that of porous base material. The oxide film and base material have mean pore diameter of 1-100 nm and 0.004-20 mu m, respectively. The oxide film has thickness of 5 mu m or less. The metal distribution pattern has needle shape, triangle shape or hanging bell shape, and has peak in center or its vicinity of base material, surface side contacting with oxide film and surface side, which is not contacting with oxide film. Preferred Metal: The metal of metal filled layer is metal used for electroless plating processing, such as transition metal or its alloy. The transition metal is group 4 metal, group 5 metal, group 8 metal, group 9 metal and/or group 11 metal, preferably silver, palladium, rhodium, ruthenium, gold, platinum, iridium, osmium, copper, nickel, cobalt, iron, titanium and/or vanadium, more preferably palladium. Preferred Method: A gel thin film consisting of cationic surfactant and oxide source is formed on surface of porous base material, and a multilayer structure is formed. The structure is baked to produce composite material. Preferred Source: The oxide source is silicon source chosen from colloidal silica, sodium silicate, tetraalkyl ammonium silicate and/or silicon alkoxide, preferably tetraethyl orthosilicate. The solution containing metal source is palladium acetate, palladium nitrate, palladium chloride, palladium acetylacetonate, palladium chlorate and/or palladium hexafluoro acetylacetonate. The solution containing reducing agent is ascorbic acid, sodium ascorbate, sodium borohydride, potassium borohydride, dimethylamine borane, trimethylamine borane, citric acid, sodium citrate, tannic acid, diborane, hydrazine, formaldehyde, glucose and/or tin chloride.