A pixel of an organic light emitting display device includes a first transistor connected between a data line and a first node, a second transistor connected between a second node and a third node, a third transistor connected between the second node and a fourth node, a fourth transistor connected between the first node and the second node, a fifth transistor connected between the third node and an initializing power source, a sixth transistor connected between a first power source and the third node, a capacitor connected between the first node and the fourth node, and an organic light emitting diode (OLED) connected between the second node and a second power source.