A Plasma Display Panel (PDP) includes: a rear substrate; address electrodes arranged in predetermined intervals over the rear substrate; a rear dielectric layer arranged to cover the address electrodes; barrier ribs arranged to partition discharge spaces on the rear dielectric layer; phosphor layers arranged in the discharge spaces; a front substrate arranged over and facing the rear substrate; and sustain electrodes arranged orthogonal to the address electrodes under the front substrate. A pair of sustain electrodes includes: a common electrode and a scan electrode arranged within a discharge region corresponding to a discharge space to have a discharge gap therebetween; bus electrodes respectively connected to the sustain electrodes; a front dielectric layer arranged to cover the sustain electrodes and the bus electrodes; and at least one initial discharge inducing string each respectively disposed in a discharge region in the front dielectric layer, the at least one initial discharge inducing string comprising a material having a different dielectric constant than that of the front dielectric layer.