A differential sampling circuit includes: a first switching element having a first terminal receiving a first signal of a differential signal pair, a second switching element having a first terminal receiving a second signal of the differential signal pair, a first sampling capacitor connected between two second terminals of the first and the second switching elements, a third switching element connected between the second terminal of the second switching element and a reference voltage, a fourth switching element having a first terminal receiving the second signal, a fifth switching element having a first terminal receiving the first signal, a second sampling capacitor connected between two second terminals of the fourth and the fifth switching elements, and a sixth switching element connected between the second terminal of the fifth switching element and the reference voltage.