A two way organic light emitting display device having red, green and blue organic light emitting diodes at corresponding red, green and blue sub-pixels comprises an anode layer disposed at each sub-pixel and each including a first electrode, a first color control layer corresponding to the red sub-pixel and disposed on the first electrode, a second color control layer corresponding to the green sub-pixel and disposed on the first electrode, and a third color control layer corresponding to the blue sub-pixel and disposed on the first electrode, and a second electrode electrically connected to the first electrode and disposed on the first, second and third color control layers, an organic light emitting layer disposed on the anode layer and emitting white light; and a cathode layer disposed on the organic light emitting layer, wherein the white light passes through the first, second and third color layers having different thicknesses and the anode layer and is converted to red, green and blue light in a first direction and passes through the red, green and blue color filters and is converted to red, green and blue light in a second direction, opposite to the first direction.