The gate driver circuit according to an embodiment of the present invention comprises a plurality of stages, each stage comprising two input transistor forming the diode connection input, the pull-pool of up transistors and the bootstrap capacitor - eopbu, each of the two It includes down part - made up of transistors the first and the second pool. According to an embodiment, the input and the pool may further include an input capacitor coupled to the node between eopbu. And, connected to the output terminal may further include a carriage configured to transmit the output signal of the high state or the low state to the next stage. According to the present invention, it is possible to stably operate the oxide thin film transistor having a depletion mode characteristics, it is possible to reduce power consumption. Further, output waveforms of each stage of the gate driver circuit can be increased by the charging time of the pixel output to be superimposed by the output waveform and the half of the previous stage.