An apparatus for supporting a two-sided emission Organic Electroluminescent Display (OELD) panel having a display element includes: a first support member having a first groove and supporting one side of four sides of the flat display panel; and a pair of second support members each having a second groove and supporting opposite sides excluding the one side of the four sides of the flat display panel. A side opposite to the one side of the four sides of the flat display panel is exposed, and the flat display panel is arranged in the first groove of the first support member and the second grooves of the pair of second support members and is supported by the first support member and the pair of second support members.