1. An organic light emitting display device, comprising: a plurality of color sub-pixels on a substrate and including first, second and third color sub-pixels, each of the color sub-pixels including a light emitting diode configured to generate light, the first and second color sub-pixels disposed along a first direction, and the third color sub-pixel disposed adjacent to the first and second color sub-pixels along a second direction different from the first direction; and a plurality of driving sub-pixels on the substrate and configured to drive the light emitting diodes of the color sub-pixels, each of the driving sub-pixels including at least a driving transistor and a switching unit, each and every one of the driving sub-pixels overlapping with at least two color sub-pixels among the plurality of color sub-pixels, wherein the first, second and third color sub-pixels correspond to a portion of four of the driving sub-pixels, and wherein one of the driving sub-pixels overlaps with three or four corresponding color sub-pixels among the plurality of color sub-pixels.