An organic light emitting display device includes a plurality of pixels each having a pixel driving circuit. Each of the pixels includes an organic light emitting diode and a driving TFT that controls driving of the organic light emitting diode and includes an active layer of low temperature poly-silicon, a gate node, a source node, and a drain node. The pixels include first to fifth switching TFTs electrically connected to the driving TFT and each including an active layer of an oxide semiconductor, a gate node, a source node, and a drain node. Further, the pixels include a storage capacitor connected between the gate node of the driving TFT and the source node of the fifth switching TFT and a coupling capacitor electrically connected in series to the storage capacitor and configured to cause capacitive coupling to supply a bootstrapped voltage to the gate node of the driving TFT.