An organic light emitting display device includes: a plurality of pixels coupled to scan lines and data lines; a plurality of scan driving circuits configured to receive a circuit selection signal and a line control signal, and to output a scan signal to the scan lines, corresponding to the circuit selection signal and the line control signal; a plurality of data driving circuits respectively coupled to the data lines, the plurality of data driving circuits being configured to select at least one of a first pre-emphasis voltage, a second pre-emphasis voltage, a first data voltage or a second data voltage, and to output the selected voltage to a corresponding one of the data lines; and a first decoder configured to supply the first pre-emphasis voltage, corresponding to the circuit selection signal and the line control signal.