Provided are an organic light emitting display device and a method of manufacturing the organic light emitting display device according to an exemplary embodiment of the present disclosure. The organic light emitting display device includes: a substrate including a display area and a pad area; a pad electrode structure on the substrate in the pad area and including a first pad electrode and a second pad electrode on the first pad electrode; and a protection conductive layer covering a lateral surface of the second pad electrode so as to reduce corrosion of the second pad electrode.