A flat display device may include a plurality of electrodes arranged in one direction, a first transistor coupled between the plurality of electrodes and a first power source for supplying a first voltage, and a gate driving circuit for supplying a driving voltage to a gate of the first transistor through a push-pull circuit including second and third transistors coupled between second and third power sources for respectively supplying second and third power sources, wherein a resistance formed between the second transistor and the second power source is greater than that formed between the third transistor and the third power source.