Abstract: C60 γ aminopropylsilyl bonded silica was synthesized by chemical attachment of γ aminopropylsilyl to silica, followed by the reaction of C60 with alkylamine. Using elemental analysis and the method for measuring the amounts of alkylamine described by Esko et al., the content of bonded C60 was determined to be 1 19×10 -5 mol and 1 09×10 -5 mol in per gram silica, respectively.