To cool a plasma display be attaching a heat conductive metal plate to the plasma display, providing a corona generation electrode oppositely to the heat conductive metal plate and generating corona from the corona generation electrode to produce ion wind.

A plasma display 10 is attached to a heat conductive metal plate 30 via a high heat conductive sheet 20. In a surface opposite the surface of the heat conductive metal plate 20 to which the plasma display 10 is attached, a plurality of corona generation electrodes 60 are arranged in parallel and oppositely to the heat conductive metal plate 30. When a voltage is applied to the corona generation electrode 60, corona is generated from the corona generation electrode 60. Then, the heat conductive metal plate 30 act as an ion attraction electrode to produce ion wind toward the heat conductive metal plate 30, and the heat conductive metal plate 30 is cooled. Thus, the plasma display 10 is cooled and a compact cooling mechanism is provided with hardly causing noise problems.