An internal voltage generating circuit includes a supply voltage driving unit, an internal voltage driving unit, and a driving control unit. The supply voltage driving unit is configured to compare a voltage division signal of a supply voltage with a bias voltage, generate a first pull-up signal, and drive the supply voltage in response to the first pull-up signal. The internal voltage driving unit is configured to receive the supply voltage, generate a second pull-up signal, and drive an internal voltage. The driving control unit is configured to select the first pull-up signal or a power supply voltage as a third pull-up signal.