Disclosed is an organic light-emitting display apparatus. The organic light-emitting display apparatus includes a pixel electrode that is connected to at least one thin film transistor, an opposite electrode that is disposed to face the pixel electrode, an organic light emitting layer that is disposed between the pixel electrode and the opposite electrode, and a pad electrode that includes a first pad layer, a second pad layer disposed on the first pad layer, and a third pad layer which is disposed between the first pad layer and the second pad layer and contains a material having a reducibility that is lower than a reducibility of a material contained in the second pad layer.