Plasma display and driving method thereof

In a plasma display device, a plurality of row electrodes performing a display operation are divided into first and second row groups, and row electrodes of first and second row groups are divided into a plurality of sub-groups. In a first subfield of a first subfield group among the plurality of subfields, performed is selecting non-light emitting cells among discharge cells of one sub-group among the plurality of sub-groups of the first row group during a first period, sustain-discharging light emitting cells of at least one first sub-group among the sub-groups of the second row group, and not sustain-discharging light emitting cells of at least one second sub-group among the plurality of sub-groups. Accordingly, each subfield can express different weight values, and the length of one subfield can be reduced since a sustain discharge is generated in one row group while non-light emitting cells are selected in another row group.