An organic light emitting display device constructed with an active layer of a thin film transistor formed on a substrate; a gate electrode including a first transparent conductive layer and a first metal layer formed on the active layer and a first insulating layer, source and drain electrodes including a second metal layer connected to the active layer through a contact hole formed in the second insulating layer, a third metal layer formed on the second metal layer, and a second transparent conductive layer formed on the third metal layer, formed on the gate electrode and a second insulating layer, a pixel electrode including the first transparent conductive layer, the third metal layer, and the second transparent conductive layer formed on the first insulating layer; and an intermediate layer disposed on the pixel electrode.