An organic light emitting diode display, includes a substrate; a thin film transistor and a storage capacitor that are disposed and spaced apart from each other on the substrate; and an organic light emitting diode that is connected to the thin film transistor. The storage capacitor includes a capacitor lower electrode, a capacitor insulating layer disposed on the capacitor lower electrode, and a capacitor upper electrode disposed on the capacitor insulating layer. The capacitor lower electrode is a conducting oxide semiconductor into which hydrogen has diffused.