A power line filter including a socket, a housing, a plurality of filter elements and a ground inductor is disclosed. The socket includes at least one power pin and a ground pin. The housing is assembled with the socket, and includes a first receptacle and a second receptacle. The opening direction of the first receptacle is opposite to the opening direction of the second receptacle. The plurality of filter elements is disposed in the first receptacle. At least one of the filter elements is electrically connected to the power pin. The ground inductor is disposed in the second receptacle and electrically connected to the ground pin.