An organic light emitting display device capable of ensuring the drive stability. The organic light emitting display includes a plurality of pixels; first signal supply lines respectively coupled to the pixels disposed in at least two horizontal lines; and second signal supply lines being lower in number than the first signal supply lines and respectively coupled to the pixels disposed in the horizontal lines includes a scan driver driving the first and second signal supply lines; a data driver driving data lines disposed in a direction that is crossed to the first and second signal supply lines; and a dummy pattern block providing dummy patterns so that loads of the second signal supply lines are identical to loads of the first signal supply lines.