A common mode choke coil has a core including a winding base, and a first and a second wire wound around the winding base side by side. The winding base includes a first area and a second area. The first area is from a first end of a region where the first wire is in contact with the winding base to a first point in the region. The second area is from a second end, which is opposite to the first end, of the region to a second point in the region. The second area does not overlap with the first area. When the first and second wires on a same turn are compared with each other, in the first area, the first wire is located nearer the first end, and in the second area, the first wire is located nearer the second end.