A plasma display includes a plurality of discharge cells, and is driven with one frame divided into a plurality of subfields having respective weight values. Light emitting cells are selected through address discharge during an address period of each subfield, and sustain discharge is performed on the light emitting cells for a number of times corresponding to a weight value of the corresponding subfield during a sustain period of each subfield to display images. The plasma display provides a sensing period for identifying an external contact with the plasma display prior to the address period in at least one subfield of the plurality of subfields, and discharges the plurality of discharge cells during a sensing period. The plasma display identifies the external contact based on light generated from the discharge cells during the sensing period.