A scan driving apparatus includes a plurality of sequentially arranged scan driving blocks, each including: a first node configured to receive a first clock signal; a second node configured to receive an input signal according to a second clock signal input; a first transistor having a gate electrode coupled to the first node, a first electrode configured to receive a power source voltage, and a second electrode coupled to an output terminal; and a second transistor having a gate electrode coupled to the second node, a first electrode for receiving a third clock signal, and a second electrode coupled to the output terminal. Each scan driving block is configured to receive the first, second, and third clock signals as a corresponding three clock signals among four clock signals sequentially shifted by a first period, and to output the third clock signal by being synchronized with the input signal.