TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The seed nucleus having diameter of 1-20 nm, is precipitated uniformly on the non-electroconductive porous base material by reduction process which is performed using hydrazine as a reducing agent, after maintaining the palladium complex uniformly on the surface of the non-electroconductive porous base material. The surface of non-electroconductive porous base material is uniformly maintained with the palladium complex, by impregnating palladium complex solution into the non-electroconductive porous base material. Preferred Composition: The total concentration of palladium and silver, contained in the plating liquid is 0.0005-0.02 M. The metal conversion mass ratio (Ag/Pd) of a silver salt and a palladium salt is 0.01-0.5, preferably 0.05-0.3. The plating liquid has ammonia concentration of 5-10 M, chelating agent concentration of 0.02-0.02 M and ethylene diamine tetraacetic acid (EDTA) concentration of 0.05-0.1 M.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The seed nucleus having diameter of 1-20 nm, is precipitated uniformly on the non-electroconductive porous base material by reduction process which is performed using hydrazine as a reducing agent, after maintaining the palladium complex uniformly on the surface of the non-electroconductive porous base material. The surface of non-electroconductive porous base material is uniformly maintained with the palladium complex, by impregnating palladium complex solution into the non-electroconductive porous base material. Preferred Composition: The total concentration of palladium and silver, contained in the plating liquid is 0.0005-0.02 M. The metal conversion mass ratio (Ag/Pd) of a silver salt and a palladium salt is 0.01-0.5, preferably 0.05-0.3. The plating liquid has ammonia concentration of 5-10 M, chelating agent concentration of 0.02-0.02 M and ethylene diamine tetraacetic acid (EDTA) concentration of 0.05-0.1 M. EXAMPLE - Porous tube made from alumina (having internal diameter of 1.6 mm and outer diameter of 2 mm), was immersed in acetonitrile solution (20 ml) containing acidic acid palladium complex (0.4 wt.%) for 5 minutes, and air-dried at 100degreesC, and solvent was removed completely. The porous tube supported with acetic acid palladium complex was immersed in aqueous solution obtained by mixing 1 M hydrazine aqueous solution and 1M sodium carbonate aqueous solution in volume ratio of 8:2. The palladium complex is reduced and precipitated on the surface of porous tube. The porous tube provided with precipitated metal palladium was washed with acetonitrile. The palladium seed nucleus having diameter of 20 mm or less was uniformly provided on the surface of porous tube, when observed through electron microscope.