To provide a current limiting circuit having an output short circuit protection function for preventing damage caused by overheat.

A current limiting circuit 1 having an output short circuit protection function comprises an input current unit 10, a driving transistor 11, a voltage regulator resistor 12, a voltage regulator transistor 13, and a delay unit 14. The driving transistor 11 has a gate electrode G, a drain electrode D, and a source electrode S. The voltage regulator resistor 13 has a gate electrode G, a drain electrode D, a source electrode S, and a parasitic capacitance C_P. When the load is shorted, the delay unit 14 charges the parasitic capacitance C_P via the voltage regulator resistor 12 to reduce the internal resistance of the voltage regulator transistor 13 to less than the internal resistance of the driving transistor 11. A period in which the voltage regulator transistor 13 holds low internal resistance is extended to maintain the driving transistor 11 at high resistance in a constant cycle.