A plasma display device is provided. The plasma display device includes a plasma display panel (PDP) which has an upper substrate, a lower substrate, a plurality of scan electrodes and a plurality of sustain electrodes that are disposed on the upper substrate, and a plurality of address electrodes that are disposed on the lower substrate; and a driving unit which applies driving signals to the scan electrodes, the sustain electrodes and the address electrodes. The driving unit drives the scan electrodes in units of scan electrode groups during an address period, and applies different voltages to the scan electrodes, thereby enabling an address discharge to be stably performed.