Provided are an organic light-emitting display device and a method of manufacturing the same. The organic light-emitting display device includes a panel including a display unit on which an image is formed and a pad unit including a plurality of terminals connected to the display unit and arranged in a plurality of rows on a substrate, and a flexible circuit board including metal wirings arranged in a plurality of layers so as to be respectively connected in correspondence to the plurality of rows of terminals in the pad unit and being coupled to the pad unit, in which the pad unit includes a one-row terminal zone in which only terminals in a single row from among the plurality of rows of terminals electrically connect the metal wirings to the display unit.