1. A method of driving a plasma display panel, comprising the steps of: establishing at least one of write sub-field at which a writing data for selecting on-cells; establishing at least one of erase sub-field for expressing a gray scale value while selecting a off-cell among said on-cells selected in the previous sub-fields including said write sub-fields; mapping a erase data having a first logic value for selecting off-cell onto the number of erase sub-field smaller than the total number of erase sub-field; and mapping a data having a second logic value different from that of said erase data onto the remaining erase sub-field other than the erase sub-field on which said erase data has been mapped.