An organic light-emitting display device includes a substrate having a display area and a non-display area, a thin-film transistor (TFT) that includes a gate electrode and that is disposed in the display area of the substrate, a first scan line disposed in a same layer as the gate electrode that is connected to the gate electrode; and a second scan line disposed in a different layer from the first scan line that overlaps the first scan line, wherein the first scan line is connected to the second scan line in the non-display area of the substrate.