A residual current device includes an insulating housing, an electromagnetic induction module, a leakage current detecting module and an electromagnetic shielding structure. The insulating housing includes a base and a lid. The electromagnetic induction module is disposed in the base. The electromagnetic induction module includes a core base and an iron core. The leakage current detecting module is disposed in the base. The leakage current detecting module includes a circuit board assembly, a detecting circuit disposed on the circuit board assembly and a lead frame electrically connected to the circuit board assembly. The electromagnetic shielding structure is disposed in the base and covers the leakage current detecting module. The effect of preventing electromagnetic interference is achieved.