An organic light emitting display device includes a plurality of pixels. Each pixel includes a first electrode, a first light emitting layer to emit first light, a second light emitting layer to emit second light, a third light emitting layer to emit third light, a second electrode on the first, second, and third light emitting layers, a fourth light emitting layer on the second electrode to emit fourth light, and a third electrode on the fourth light emitting layer. The first, second, and third light emitting layers are on the first electrode. The first light, second light, and third light are different and are emitted in a first mode and the fourth light is emitted in a second mode.