An internal voltage generation circuit includes a shifting source voltage generation circuit configured to generate a shifting source voltage having a voltage level that falls as a voltage level of a power supply voltage rises during a period when the power supply voltage is lower than a preset voltage level. The internal voltage generation circuit also includes an internal voltage regulator configured to generate a driving signal through a level shifting operation that is performed according to the shifting source voltage received when driving an internal voltage and configured to drive the internal voltage based on the driving signal.