TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Oxide: The inorganic oxide which is uniformly dispersed in the resin sheet is a substance chosen from a group consisting of soda glass, alkali free glass, silica, titanium dioxide, antimony oxide, titania, alumina, zirconia and tungsten oxide. The content rate of inorganic oxide is 3-50 wt.% with respect to all epoxy resins. The average particle diameter of inorganic oxide is preferably 10 nm-50 microns.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Oxide: The inorganic oxide which is uniformly dispersed in the resin sheet is a substance chosen from a group consisting of soda glass, alkali free glass, silica, titanium dioxide, antimony oxide, titania, alumina, zirconia and tungsten oxide. The content rate of inorganic oxide is 3-50 wt.% with respect to all epoxy resins. The average particle diameter of inorganic oxide is preferably 10 nm-50 microns.    TECHNOLOGY FOCUS - POLYMERS - Preferred Resin: The polysulfide-type structure of the epoxy resin is of formula (1). The content rate of epoxy resin having polysulfide-type structure with respect to all epoxy resins is 3-30 wt.%.R1,R2=organic acid having bisphenol structure;andn=polymerization degree.Preferred Sheet: The resin sheet further contains cycloaliphatic epoxy resin and further has a hard coat layer containing a urethane resin, and a gas barrier layer. The resin sheet has linear expansion coefficient of less than 5x10-5/degreesC at 25-160degreesC, glass transition temperature of 170degreesC or more, light transmittance of 88% or more, and fracture strength of more than 40 N. EXAMPLE - Polysulfide-type epoxy resin (formula (1)) (in weight parts) (26.6) having epoxy equivalent of 320 and viscosity of 25 Pa.seconds at 25degreesC, was mixed with 3,4-epoxycyclohexyl methyl-3,4-epoxy cyclohexane carboxylate (26.6), methyl hexahydrophthalic anhydride (48.5) and tetra-n-butyl phosphonium-o,o-diethyl phosphoro dithioate (1) to obtain an epoxy resin liquid. The obtained epoxy resin liquid (840) was mixed with glass beads (340) having specific gravity of 2.5 and average particle diameter of 30 microns to obtain inorganic oxide-containing epoxy resin liquid. The obtained inorganic oxide-containing epoxy resin liquid, 5.5 wt.% polyvinyl alcohol aqueous solution obtained by suspending polyvinyl alcohol having polymerization degree of 1800 in water, and 17 wt.% urethane acrylate solution obtained by suspending urethane acrylate (formula (5), where R was shown by formula (5a)) in toluene, were co-extruded to obtain a laminate (resin sheet) sequentially having epoxy resin layer, gas barrier layer and hard coat layer. The resin sheet had fracture strength of 75 N, light transmittance of 87%, glass transition temperature of 121degreesC linear expansion coefficient of 5x10-5/degreesC, and excellent dimensional stability.