An organic light emitting display that includes a display panel, a power supply and a coupling member. The display panel includes scan lines, data lines, first power lines and a plurality of pixels. The power supply is positioned at the outside of the display panel, and supplies first power to the display panel through a coupling member. The coupling member includes first and second coupling portions respectively coupled to the power lines, first and second coupling lines transmitting the first power supplied from the power supply to the respective first and second coupling portions, and a feedback line transmitting the voltage of the second coupling portion to the power supply. Accordingly, it is possible to provide an organic light emitting display capable of precisely controlling the voltage of output power and preventing the deterioration of the luminance of a display panel.