A scan driver circuit for an active matrix array includes a plurality of stages and a plurality of decoders that are sequentially driven at different driving timings in a same stage based on a combination of the plural decoder signals or that are driven at the same timing in different stages where a last decoder of the plural decoders sequentially outputs a scan line signal according to a driving state of the plural decoders in each of plural stages, each of the plural decoders includes an input part, an output part and a reset part, and the input part includes a first decoding transistor, a fourth decoding transistor connected to a clock signal and second, third, fifth and sixth decoding transistors connected in series to each of the first decoding transistor and the fourth decoding transistor and connected to the plural decoder signals.