Provided is a switching regulator including a circuit for detecting a short-circuit state easily and reliably, without the need of an adjustment step such as trimming. In accordance with a drive signal of a power switching element of the switching regulator, a discharge circuit is controlled. When the power switching element is short-circuited and becomes the ON state all the time, the discharge circuit stops its operation, and a capacitor is continuously charged. A voltage detection circuit detects that a charge voltage of the capacitor has reached a predetermined potential, to thereby detect the short-circuit state.