An organic light emitting display including an image display unit including a plurality of data lines arranged in a first direction, a plurality of scan lines arranged in a second direction, and a plurality of pixels arranged at intersections of the data lines and the scan lines; a plurality of main power source lines and auxiliary power source lines arranged to intersect each other, the plurality of main power source lines and auxiliary power source lines transmitting a first power source as a pixel power source to the pixels; and auxiliary metal layers overlapping portions of the auxiliary power source lines in regions between adjacent pixels, the auxiliary metal layers having a lower resistance value than a resistance value of the auxiliary power source lines, wherein the auxiliary metal layers are electrically coupled with the auxiliary power source lines.