A plasma display apparatus is provided. The plasma display apparatus comprises an energy recovery unit and a sustain driver for applying a voltage recovered from the energy recovery unit to sustain electrodes as a bias voltage in an address period. The voltage recovered to a source capacitor is applied as the bias voltage in the address period so that it is possible to apply the bias voltage that varies in accordance with the sustain voltage of a plasma display panel without an additional external power source. As a result, it is possible to reduce the manufacturing expenses of the plasma display apparatus.