A plasma display apparatus is disclosed. In one embodiment, the apparatus includes i) a plasma display panel displaying images, ii) a chassis base disposed on a rear portion of the plasma display panel, iii) a circuit unit disposed on a rear portion of the chassis base to drive the plasma display panel, and iv) at least one reinforcing member coupled to a rear surface of the chassis base. In addition, one of the chassis base and the reinforcing member includes two or more aligning recesses that are separated from each other, and the other includes aligning protrusions to be inserted into the aligning recesses. According to one embodiment of the invention, the reinforcing members can be located exactly and coupled rapidly to the chassis base.