Hybrid composites of novolac resin were prepared by using graphene oxide (GO) which was functionalized with furfuryl alcohol and silica nanoparticles (SiO2). For this purpose, SiO2 was modified with silane coupling agent of (3-aminopropyl)triethoxysilane (APTES) to obtain SiO2-NH2 and subsequently attached at the surface of furfuryl alcohol-modified GO (GOFA) to obtain SGOFA. The SGOFA was incorporated into the novolac resin matrix in two different contents of 4 and 8 wt% of the matrix. Successful modification processes of GO with furfuryl alcohol, SiO2 with APTES, and GOFA with SiO2-NH2 were confirmed by Fourier-transform infrared spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. TGA results showed that char residue of novolac resin was increased by incorporation of SGOFA from 58.4 to 61.3 and 65.4% by the addition of 4 and 8 wt% of SGOFA, respectively. Additionally, degradation temperature of novolac resin was increased by incorporation of SGOFA from 445.4 to 460.0 and 467.4 degrees C by the addition of 4 and 8 wt% of SGOFA, respectively.