An AC plasma display panel. A front substrate is opposite a rear substrate, and a plurality of ribs are interposed therebetween, defining a plurality of sub-pixels. The front substrate has a plurality of sustain electrodes extending along a first direction. Each of the sustain electrodes has a auxiliary electrode, a plurality of extending electrodes extending along a second direction and sticking into the corresponding sub-pixels, and a plurality of connecting electrodes, each of which connects adjacent extending electrodes.