TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The metal oxide fine particles are zinc oxide fine particles. Preferred Process: The metal oxide fine particles are obtained by mixing alkali metal hydroxide in alcohol solvent and carboxylic acid metallic salt compound. The silane compound (A) and silane compound (B) are mixed with metal oxide fine particles without isolating metal oxide fine particles obtained by mixing alkali metal hydroxide in alcohol solvent and carboxylic acid metallic salt compound.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The hydrolysable group-containing silane compound (A), hydrolysable group-containing silane compound (B) and metal oxide fine particles are mixed in solvent at 40-400 degrees C, preferably 50-300 degrees C and/or under pressure of 0.1-60 MPa, preferably 0.2-50 MPa. Preferred Composition: The content of hydrolysable group-containing silane compound (A) and hydrolysable group-containing silane compound (B) is 0.1-5 mol with respect to 1 mol of metal oxide. The molar ratio of hydrolysable group-containing silane compound (A) and hydrolysable group-containing silane compound (B) is 1:0.05-1:20. The solvent is alcohol. Preferred Property: The number average particle diameter of metal oxide fine particles is 0.5-20 nm. Preferred Definitions:    R=1-18C organic group chosen from methyl, ethyl, propyl, isopropyl, butyl, cyclohexyl methyl, hexyl, octyl, decyl, phenyl, vinyl, 3-methacryloxy propyl, 3-isocyanate propyl, 3-acryloxy propyl, 3-amino propyl, 3-glycidoxy propyl, 2-(3,4-epoxy cyclohexyl)ethyl, allyl, 3,3,3-trifluoropropyl and 2-cyano ethyl;and    X=alkoxy group.    EXAMPLE - Potassium hydroxide (in g) (44.9) and methanol (1.6 L) were stirred, and zinc acetate dehydrate (87.8) was dissolved in methanol (0.4 L). Then, methanol solution of zinc acetate dehydrate was added to methanol solution of potassium hydroxide and stirred at 35 degrees C for 10 minutes to obtain dispersion liquid containing zinc oxide fine particles. Then, obtained dispersion liquid (200 ml), decyl trimethoxy silane (22.1) and tetraethoxy silane (2.75) were mixed and heated at 120 degrees C under pressure of 0.5 MPa for 2 hours, filtered, and dried to obtain surface modified zinc oxide fine particles having zinc oxide content of 20 weight%.