An organic light-emitting display device is provided. An organic light-emitting display device, comprising: a first transistor including a gate electrode connected to a scan line, a first electrode connected to a data line and a second electrode connected to a first node; a second transistor including a gate electrode connected to the first node, a first electrode connected to a first power supply voltage and a second electrode connected to a second node; a third transistor including a gate electrode connected to a sensing control line, a first electrode connected to the scan line and a second electrode connected to the second node; and an organic light-emitting element including an anode electrode connected to the second node and a cathode electrode connected to a second power supply voltage.