To provide a plasma display device in which adequate gradations are obtained when displaying a dark image and display luminance of a black level is substantially low.

As a unit cell consists of a large sub-cell 37 and a small sub-cell 38 and the gradations of the small sub-cell 38 is set to 1/16, 1/8, 1/4 and 1/2 for each sub-field, the gradations of the dark image are displayed smoothly. Moreover, as light emitting luminance is substantially low when displaying a black color by performing priming discharge in the small sub-cell, a good quality image is displayed.