A source driving circuit including source channels each of which includes a source amplifier is disclosed. The source amplifier includes an internal amplifier configured to output a first pull-up signal and a first pull-down signal in response to a first gamma signal; an output circuit configured to output a first source driving signal in response to the first pull-up signal and the first pull-down signal; and first and second switch circuits connecting the internal amplifier and the output circuit, and configured to transfer the first pull-up signal and the first pull-down signal corresponding to the first gamma signal or a second pull-up signal and a second pull-down signal corresponding to a second gamma signal of another source channel, to the output circuit.