A plasma display device including: a plasma display panel including a plurality of electrodes; a printed circuit board assembly (PBA) activating the plasma display panel (PDP); a chassis base, including: a first surface supporting the plasma display panel (PDP), and a second surface having the printed circuit board assembly (PBA); signal lines applying a voltage, a data signal, and a control signal to the electrodes are formed at the end of the plasma display panel (PDP); and an interface flexible printed circuit connecting the signal lines to the printed circuit board assembly (PBA), wherein at least one of the signal lines has a line width at a portion further from the interface flexible printed circuit (FPC) that is larger than a line width at a portion closer to the interface flexible printed circuit (FPC).