The main goal of this research was to carry out the reduction of graphene oxide ( GO ) to graphene ( rGO ) by using olive leaf extract ( ELM ) . Reduction was carried out with different amounts of ELM. The sample obtained by using the smaller ratio ELM/GO was rGO1, while the sample obtained byusing higher ratio of ELM/GO was rGO2 . GO, rGO1 and rGO2 samples have been characterized by a number of methods such as Fourier transformed infrared spectroscopy ( FT - IR ) , thermogravimetric analysis ( TGA ) , and cyclic voltammetry. By TGA analysis and FT - IR spectroscopy it was found that the reduction process was successful and the obtained product ( rGO ) had significantly reduced amount of oxygen functional groups compared to the GO . Cyclic voltammetry method showed a good capacitive properties,of the obtained material indicating that in addition to removal of oxygen functional groups. the regeneration of sp2 hybridization also takes place during the reduction process. The specific capacitance values for rGO1 sample were 12-25 F g^-1 and for rGO 2 sample 117 to 227 F g^-1 which depends on potential range of investigation. The results obtained in this work indicate that by using phenolic compounds from olive leaf extract it is possible to reduce GO effectively. The obtained product, rGO, can be used as an active material in electrochemical power sources.