The present invention discloses a
plasma display device comprising a
plasma display panel containing maintaining
electrode; a bias supplying part which supplies bias to the maintaining
electrode during positioning time; a base
voltage supplying part which supplies base
voltage to the maintaining
electrode during maintaining time; a maintaining
voltage supplying part which supplies maintaining voltage to the maintaining electrode during maintaining time; and a
short circuit preventing part, one end of which is connected to one end of the base voltage supplying part, while the other end of which is connected to common end of the bias supplying part and the maintaining voltage supplying part. The present invention is capable of reducing the cost of the negative maintaining electrode drive circuit, and reducing the external loaded maintaining
discharge voltage because the device of the present invention has
low impedance and the voltages at both ends of the panel are higher than that before; and the present invention has stable
discharge characteristics and is capable of improving the efficiency of the drive circuit and reducing the cost of the switching member of the
short circuit preventing part.