A plasma display device (PDP), and a structure stabilizing drive pulses in a PDP the structure including a panel, a chassis base which is mounted on an upper part of the panel to form a current path and dissipates heat, a case the dissipates the heat in connection with the chassis base, a chassis reinforcing member mounted on an upper part of the chassis base, a driving circuit substrate mounted on an upper part of the chassis reinforcing member, a signal transmitting element that transmits signals between the driving circuit substrate and the panel, and a carbon group thermal conductive sheet that is interposed between the panel and the chassis base to electrically connect the panel to the chassis base, and grounded to the chassis base. The carbon group thermal conductive sheet reduces inductance between the panel and the chassis base, and accordingly, the generation of an electromotive force, which affects the driving pulses, is reduced, thereby enabling a stable panel discharge.