The liquid fullerene derivative according to the present invention contains a fullerene moiety, a benzene ring bonded to the fullerene moiety, and first to third alkyl substituents R1, R2 and R3 bonded to 2-, 4- and 6-positions of the benzene ring, respectively, and the first to third alkyl substituents R1, R2 and R3 each contain at least 12 carbon atoms. The liquid fullerene derivative which is liquid at room temperature without requiring a solvent and easily exhibits the function of the fullerene itself, a method for producing the same, and a device using the same are provided.