An ultra-thin television includes a backlight element, a base board and a radiating element. The backlight element includes at least one light source. The base board is positioned on a side of the backlight element. The base board includes a main body defining at least one radiating space and a metal plate covering the main body. Each of the at least one radiating space extends to the metal plate. The radiating element includes a first portion positioned on one side of the at least one light source and a second portion connecting to the first portion. The second portion corresponds to and is received in the at least one radiating space to connect to the metal plate.