A sub-pixel of an organic light emitting display device comprising an organic light emitting diode connected to a first node; a driving transistor comprising a first electrode, a second electrode connected to the first node, and a gate electrode connected to a second node; a first capacitor connected between the first node and the second node; a second capacitor connected between a programming line and the second node; a first transistor comprising a first electrode connected to the first electrode of the driving transistor, a second electrode connected to the second node, and a gate electrode connected to a scan line; and the first capacitor and the second capacitor are configured to couple the voltage of the first node and the voltage of the second node based on the programming voltage applied to the programming line.