An organic light emitting display device, including a substrate, a first conductive layer pattern on the substrate, a first insulation layer pattern on the first conductive layer pattern, a first semiconductor layer pattern on the first insulation layer pattern, a gate insulation layer pattern on the gate insulation layer pattern, a gate electrode on the gate insulation layer pattern, a planarization layer on the gate electrode, the planarization layer including a first protruding portion protruded in a first direction perpendicular to an upper surface of the substrate, a lower electrode on the first protruding portion, a pixel defining layer exposing at least a portion of the lower electrode, the pixel defining layer covering opposite side portions of the first protruding portion, a light emitting layer on the lower electrode, and an upper electrode on the light emitting layer.