An organic light emitting display device includes a substrate having transmitting and pixel regions, the pixel regions being separated by the transmitting regions, at least one thin film transistor in each of the pixel regions, a plurality of transparent first conductive lines electrically connected to the thin film transistors and extending across the transmitting regions, a plurality of second conductive lines electrically connected to the thin film transistors and extending across the transmitting regions, a passivation layer, a plurality of pixel electrodes on the passivation layer, the pixel electrodes being separated and positioned to correspond to respective pixel regions, each of the pixel electrodes being electrically connected to and overlapping a corresponding thin film transistor, an opposite electrode overlapping the pixel electrodes in the transmitting and pixel regions, and an organic emission layer between the pixel electrodes and the opposite electrode.