<p>Provided is a light-diffusing non-combustible composite member which has a good balance between non-combustibility and flexibility, while having excellent light diffusion properties. A light-diffusing non-combustible composite member of the present invention is a composite member which is obtained by applying a condensation-reactive silicone resin over at least one surface of a glass fiber sheet or by impregnating a glass fiber sheet with a condensation-reactive silicone resin, said composite member having a total light transmittance of 60% or more and a haze value of 80% or more. The condensation-reactive silicone resin may be an inorganic oxide particle-containing condensation-reactive silicone resin which is formed of a crosslinked structure wherein inorganic oxide particles dispersed in a polysiloxane resin having a condensation-reactive group are crosslinked with the polysiloxane resin by chemical bonds.</p>
