A plasma display apparatus and driving method thereof are disclosed. The plasma display apparatus comprises: a plasma display panel comprising scan electrodes and sustain electrodes, a scan driver for supplying a first pulse to the scan electrodes before a reset period of a first subfield, a first reset pulse gradually falling after maintaining a constant voltage to the scan electrodes during the reset period, and a second reset pulse having a voltage higher than the constant voltage of the first reset pulse to the scan electrodes during a reset period of a second subfield and a sustain driver for supplying a second pulse with a polarity opposite a polarity of the first pulse to the sustain electrodes corresponding to the first pulse before the reset period.