Barrier ribs are disposed on a back substrate so as to separate main discharge cells and priming discharge cells, and the top parts of the barrier ribs are formed so as to abut on a front substrate. In a driving method, in an odd-numbered line writing time period, scan pulse Va is sequentially applied to odd-numbered scan electrode SCp and voltage Vq is applied to even-numbered sustain electrode SUp+1 to cause priming discharge between even-numbered sustain electrode SUp+1 and odd-numbered scan electrode SCp. In an even-numbered line writing time period, scan pulse Va is sequentially applied to even-numbered scan electrode SCp+1 and voltage Vq is applied to odd-numbered sustain electrode SUp to cause priming discharge between odd-numbered sustain electrode SUp and even-numbered scan electrode SCp+1.