An organic light emitting display device includes, a light emitting structure, a pixel defining structure that includes first and second pixel defining layers, and a first wiring. The light emitting structure is disposed on a substrate and includes a pixel electrode, an organic light emitting layer and an opposite electrode. The first pixel defining layer is disposed on the substrate and partially covers the pixel electrode. The second pixel defining layer is disposed on the first pixel defining layer. The first wiring is disposed between the substrate and the first pixel defining layer and between the substrate and the second pixel defining layer, and is in contact with the first pixel defining layer and the second pixel defining layer. An adhesive strength between the second pixel defining layer and the first wiring is greater than an adhesive strength between the second pixel defining layer and the first pixel defining layer.