An earth leakage breaker comprises a frame, a coil group arranged on the frame and magnetized by an electric signal from a leakage detecting device, an operating rod capable of linear movement around a central line of the coil group when the coil group is magnetized, and a clutch rod, which relies on the operating rod by pressing and which are arranged on the frame as well, so as to strike a cross lever by rotating at the linear movement of the operating rod and switch a switch mechanism to the position of opening circuit, and a clutch rod spring, which is used to provide the elasticity to make the clutch rod move linearly when the coil group receives the electric signal from an electric leakage detecting device and is magnetized, so the clutch rod which can strike the cross lever in the switch mechanism by rotating in the case of electric leaking is formed, which avoids the interference phenomena between parts and ensures the drive force is transferred in a more accurate and reliable way.