To provide the driving method of a PDP device capable of surely preventing the useless display of images at the time of an initial operation when applying the power supply or the like.

In a step S5, the inactive data of 'L' are successively shifted and inputted to a shift register for a scanning driver and all scanning information is turned to 'L'. In the step S6, all image information for write stored in the shift register 3 for a write driver is set to the image information for indicating a gradation 0. In the step S7, the image information based on video signals SV are stored in a memory cell 6 synchronized with synchronizing signals SYNC after stable-input confirmation. When the processings of the steps S5-S7 are ended, shift to normal write and display operations are performed.