To provide an earth leakage breaker capable of being provided with a time-delay function by using a small inexpensive integrated circuit without having the time-delay function, and of reducing a cost by miniaturizing an electronic circuit part.

In this earth leakage breaker 1, a capacitor 13 is connected between a fourth pin of a differential amplifier output terminal of an integrated circuit 6 and a ground line 12, and a resistor 14 is connected in parallel with the capacitor 13 to compose an integration circuit 15; and a backflow-preventing diode 16 is connected between the integration circuit 15 and the fourth pin of the integrated circuit 6. Then, the connection point between the integration circuit 15 and the diode 16 is connected to a fifth pin of a latch circuit input terminal of the integrated circuit 6.