A charge pump includes a first pumping capacitor configured to pump a first voltage of a first node, in response to a first clock signal, a gate pumping capacitor configured to pump a second voltage of a second node, in response to a second clock signal, a charge transfer transistor including a first source connected to a first one of a third node and the first node, a first gate connected to the second node, and a first drain connected to a remaining one of the first node and the third node, a gate control transistor including a second source connected to the first one of the third node and the first node, a second gate connected to the remaining one of the first node and the third node, and a second drain connected to the second node, and a gate discharge or charge unit.