An antenna coil has a simple structure and a high sensitivity and can be thinner. The antenna coil includes an X Y coil unit having an X axis coil and a Y axis coil wound around a core, a Z axis coil wound around the X Y coil unit, and a resin portion insert molded around the X Y coil unit and the Z axis coil. In the antenna coil, the X axis coil, the Y axis coil, and the Z axis coil are arranged so that the three coils have an axis in a direction orthogonal to each other, and the X Y coil unit and the Z axis are integrated by the resin portion.