To provide an electric power coil for reducing the saturation of a direct current.

The electric power coil is equipped with a first magnetic core material having first and second ends. An inner cavity is formed on the first magnetic core material extending from the first end to the second end. First and second cutouts which extrude from one of the first and second ends to the inner cavity inside are formed on the first magnetic core material. Third and fourth cutouts which extrude from the other of the first and second ends to the inner cavity inside are formed in the first magnet core material. A first conductor passes through the inner cavity and is received by the first and third cutouts. A second conductor passes through the inner cavity and is received by the second and fourth cutouts. According to the situation, the first conductor passes through the inner cavity at least two times and is received by the first, second, third, and fourth cutouts.