A power feeding control apparatus for controlling electric power supplied from an external power source to an electric vehicle provided with a battery and a charging circuit for charging the battery, comprising: power feeding lines (L, N) provided to supply the electric power from the external power source to the electric vehicle therethrough; a relay unit (RY1, RY2) arranged on the power feeding lines (L, N) to open and close the power feeding lines (L, N); a control circuit for controlling the relay unit (RY1, RY2); a leakage current detection circuit for detecting leakage current in the electric vehicle; a power supply circuit supplied with the electric power through the power feeding lines (L, N) to generate a control electric power; a housing for accommodating at least the power feeding lines (L, N), the relay unit (RY1, RY2), the control circuit, the leakage current detection circuit and the power supply circuit; a power source side connector to be removably connected to a socket of the external power source; a vehicle side connector to be removably connected to a power receiving connector of the electric vehicle; and a power feeding line block provided separately from a board on which the power supply circuit is mounted and a board on which the control circuit is mounted and having metal plates (55, 56) constituting the power feeding lines (L, N), wherein the leakage current detection circuit includes a zero current transformer through which the power feeding lines (L, N) extend and is configured to detect leakage current based on unbalanced currents flowing through the power feeding lines (L, N), wherein lead plates (55A, 56A, 31B, 32B) constitute a part of the power feeding lines (L, N), characterized in that the lead plates (55A, 56A, 31B, 32B) comprise at least two parts, and one part (55A, 56A) of the lead plates passes through a central opening of the zero current transformer and is connected to the other part (31B, 32B) of the lead plates in the other side of the zero current transformer, the zero current transformer includes a positioning member molded within the central opening to fix the positions of the lead plates (55A, 56A), the metal plates (55, 56) are insertion-molded in the power feeding line block, the lead plates (55A, 56A) are integrally formed with the metal plates (55, 56), which are covered by a resin molding portion, partially protrude outwards beyond the resin molding portion, the control circuit controls the relay (RY1, RY2) based at least on a detection result of the leakage current detection circuit, the leakage current detection circuit is connected to the control circuit, and the power supply circuit supplies at least the control circuit and the leakage current detection circuit with the control electric power. power feeding lines (L, N) provided to supply the electric power from the external power source to the electric vehicle therethrough; a relay unit (RY1, RY2) arranged on the power feeding lines (L, N) to open and close the power feeding lines (L, N); a control circuit for controlling the relay unit (RY1, RY2); a leakage current detection circuit for detecting leakage current in the electric vehicle; a power supply circuit supplied with the electric power through the power feeding lines (L, N) to generate a control electric power; a housing for accommodating at least the power feeding lines (L, N), the relay unit (RY1, RY2), the control circuit, the leakage current detection circuit and the power supply circuit; a power source side connector to be removably connected to a socket of the external power source; a vehicle side connector to be removably connected to a power receiving connector of the electric vehicle; and a power feeding line block provided separately from a board on which the power supply circuit is mounted and a board on which the control circuit is mounted and having metal plates (55, 56) constituting the power feeding lines (L, N), wherein the leakage current detection circuit includes a zero current transformer through which the power feeding lines (L, N) extend and is configured to detect leakage current based on unbalanced currents flowing through the power feeding lines (L, N), wherein lead plates (55A, 56A, 31B, 32B) constitute a part of the power feeding lines (L, N), characterized in that the lead plates (55A, 56A, 31B, 32B) comprise at least two parts, and one part (55A, 56A) of the lead plates passes through a central opening of the zero current transformer and is connected to the other part (31B, 32B) of the lead plates in the other side of the zero current transformer, the zero current transformer includes a positioning member molded within the central opening to fix the positions of the lead plates (55A, 56A), the metal plates (55, 56) are insertion-molded in the power feeding line block, the lead plates (55A, 56A) are integrally formed with the metal plates (55, 56), which are covered by a resin molding portion, partially protrude outwards beyond the resin molding portion, the control circuit controls the relay (RY1, RY2) based at least on a detection result of the leakage current detection circuit, the leakage current detection circuit is connected to the control circuit, and the power supply circuit supplies at least the control circuit and the leakage current detection circuit with the control electric power.