A flat display includes an outer case having a front face frame having a opened rear face and a rear cover covering the opened rear face. The outer case is configured by an electrically conductive chassis board having a front face and a back face; a display panel attached to the front face of the electrically conductive chassis. The back face includes a panel driving unit controlling image formation on the display panel on a basis of an video signal, a source unit having an audio circuit controlling an audio signal and a tuner circuit extracting the audio signal and the video signal, and a power supply unit supplying electric power to the panel driving unit and the source unit. The outer case is partitioned into first housing portion housing the panel driving unit and the power supply unit and second housing portion housing the source unit.