A negative level shifter includes a voltage selection unit and at least one voltage level conversion unit. The voltage selection unit may apply a first voltage to a first node and a second voltage to a second node if the control signal CON is the first value and apply a third voltage to the first node and a fourth voltage to the second node if the control signal CON is the second value. The at least one voltage level conversion unit may be connected to the first node and the second node and convert a voltage level of an input signal by using a voltage of the first node and a voltage of the second node.