An organic light emitting display device includes: a pixel unit including first pixels positioned at intersection parts between first data lines and first scan lines and the second pixels positioned at intersection parts between the second data lines and the second scan lines; a scan driver sequentially supplying first scan signals to the first scan lines and sequentially supplying second scan signals to the second scan lines; a data driver supplying first output signals to first output lines and supplying second output signals to second output lines; and a demultiplexer block unit including demultiplexers which demultiplex the first output signals in response to control signals, respectively, and supply the demultiplexed signals to the first data lines, wherein the second output lines are directly connected to the second data lines.