The present invention relates to an organic light emitting display device capable of compensating threshold voltage and mobility deviation and improving aperture ratio.;An organic light emitting display device according to an embodiment of the present invention includes a plurality of pixels arranged in a matrix form, each pixel comprising: a first switching transistor configured to provide a scan signal to a gate and a data signal to a source; A driving transistor having a gate connected to a drain of the first switching transistor and a predetermined first voltage provided to a source; A storage capacitor connected between the gate and the source of the driving transistor; A second switching transistor having a drain and a source connected to the gate and the drain of the driving transistor and a control signal provided to the gate; And an EL element having an anode electrode connected to the drain of the driving transistor and a predetermined second voltage supplied to the cathode electrode.;Active, Matrix, Organic Field, Light Emitting Display
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