There is provided an emission control driver including a first signal processing unit for receiving an input power from an input power source, a main input signal, and a sub input signal, and for outputting a first output signal and a second output signal, a second signal processing unit for receiving the first output signal, the second output signal, and a clock signal, and for outputting a third output signal, and a third signal processing unit for receiving the first output signal and the second output signal, and for outputting an emission control signal. The width of the emission control signals may be freely controlled and the emission control driver having a simple structure, and the organic light emitting display using the same, may be provided.