PURPOSE: To provide the simple and sure driving method of a memory sheet type PDP having address electrode groups formed to an X-Y matrix form and memory electrodes which are pair of common electrodes.

CONSTITUTION: Wall charges are formed by maintaining the respective one of the potentials of the memory electrodes 3, 4 higher and the other lower than a discharge space potential and these wall charges are annihilated by maintaining both of the potentials of both memory electrodes at the same level as the level of the discharge space potential during an address period. The wall charges meeting image information are formed in respective cells during the address period. The cells superposed with the electric fields by the wall charges on the discharge maintaining pulses are discharged by the presence or absence of the wall charges in a memory period and the discharge is maintained during this time according to the image information. There is no need for impressing an address signal voltage and a memory voltage at the strict timing with high speed and the operation is stabilized and slowed down, by which the cost of a driving circuit is drastically reduced.