A plasma display panel (PDP) driving method and a PDP gray-representing method for improving representation performance of low gray scales is disclosed. A voltage rising from a low level voltage to a reset voltage of a reset period of a subsequent subfield is applied to a scan electrode, without having a sustain period, after performing an address operation of the subfield with the minimum weight. The discharge cell selected in the address period of the minimum weight is discharged in an initial part of the gradually rising voltage.