An organic light emitting display device, comprising: a substrate, red, green, and blue pixel areas (Rp, Gp, Bp) being defined in the substrate; a first electrode disposed at each of the red, green, and blue pixel areas (Rp, Gp, Bp) on the substrate; a first hole transporting layer disposed at each of the red, green, and blue pixel areas (Rp, Gp, Bp) on the first electrode; first to third emission common layers (142; 144; 146) on the first hole transporting layer at each of the red, green, and blue pixel areas (Rp, Gp, Bp), wherein the second emission common layer is over the first emission common layer, and wherein the third emission common layer is over the second emission common layer; an electron transporting layer on the third emission common layer and a second electrode layer on the electron transporting layer both being disposed at each of the red, green, and blue pixel areas (Rp, Gp, Bp), wherein the organic light emitting display further comprises: a second hole transporting layer disposed at the red pixel area (Rp) between the first hole transporting layer and the first emission common layer; a third hole transporting layer disposed at the green pixel area (Gp) between the first and second emission common layers (142; 144), the thickness of the third hole transporting layer being less than the thickness of the second hole transporting layer; and a fourth hole transporting layer disposed at the blue pixel area (Bp) between the second and third emission common layers (144; 146), the thickness of the fourth hole transporting layer being less than the thickness of the third hole transporting layer. a substrate, red, green, and blue pixel areas (Rp, Gp, Bp) being defined in the substrate; a first electrode disposed at each of the red, green, and blue pixel areas (Rp, Gp, Bp) on the substrate; a first hole transporting layer disposed at each of the red, green, and blue pixel areas (Rp, Gp, Bp) on the first electrode; first to third emission common layers (142; 144; 146) on the first hole transporting layer at each of the red, green, and blue pixel areas (Rp, Gp, Bp), wherein the second emission common layer is over the first emission common layer, and wherein the third emission common layer is over the second emission common layer; an electron transporting layer on the third emission common layer and a second electrode layer on the electron transporting layer both being disposed at each of the red, green, and blue pixel areas (Rp, Gp, Bp), wherein the organic light emitting display further comprises: a second hole transporting layer disposed at the red pixel area (Rp) between the first hole transporting layer and the first emission common layer; a third hole transporting layer disposed at the green pixel area (Gp) between the first and second emission common layers (142; 144), the thickness of the third hole transporting layer being less than the thickness of the second hole transporting layer; and a fourth hole transporting layer disposed at the blue pixel area (Bp) between the second and third emission common layers (144; 146), the thickness of the fourth hole transporting layer being less than the thickness of the third hole transporting layer. a second hole transporting layer disposed at the red pixel area (Rp) between the first hole transporting layer and the first emission common layer; a third hole transporting layer disposed at the green pixel area (Gp) between the first and second emission common layers (142; 144), the thickness of the third hole transporting layer being less than the thickness of the second hole transporting layer; and a fourth hole transporting layer disposed at the blue pixel area (Bp) between the second and third emission common layers (144; 146), the thickness of the fourth hole transporting layer being less than the thickness of the third hole transporting layer.