a plasma display panel having sustain and scan electrodes of different widest is disclosed . embodiments of the plasma display panel allow scan electrodes performing reset discharge , address discharge , and sustain discharge to have a width or a thickness greater than that of sustain electrodes in order to relatively reduce impedance of the scan electrodes , thereby applying equal driving pulses to the scan and sustain electrodes during the sustain discharge period , resulting in improvement of the luminous efficiency of the plasma display panel .