A plasma display device includes a PDP module having a plasma display panel (PDP), a drive circuit applying positive and negative sustain pulses having the same absolute value to the PDP, and a voltage detection circuit detecting voltage from the power supply module, and a power supply module having voltage output terminals connected to voltage input terminals of the PDP module through connection means, generating a positive voltage required to produce positive sustain pulses and a negative voltage required to produce negative sustain pulses from an AC supply voltage, both pulses being supplied to the PDP module, outputting both voltages from the voltage output terminals, and performing a feedback control for the output voltage based on a detection result from the voltage detection circuit, thereby effectively generating the positive and negative voltages required to produce the positive and negative sustain pulses without complex circuit configuration.