Prepared are three types of composite supercapacitor electrode, such as electroactive polyaniline(PAN), PAN/multi-walled carbon nanotube(CNT), and PAN/CNT/RuO2. Cyclic voltammetry was performed to investigate the supercapacitive properties of these electrodes in an electrolyte solution of 1.0M H2SO4. The PAN/CNT/RuO2 electrode showed the highest specific capacitance at all scan rates(e.g., 441 and 392 F g-1 at 100 and 1,000 mV s-1, respectively). In cycle performance, however, the PAN/CNT electrode demonstrated the best capacitance retention (66%) at 104th cycle.