Abstract: A noncontact power supply device provided with one or more coil units and a cover housing the coil units inside of it. The cover is formed by joining a first sheet arranged at one surface sides of front and back surfaces of the coil units and a second sheet arranged at the other surface sides, the first sheet is a sheet covering the one surface sides of the coil units, the second sheet is a sheet having another surface part covering the other surface sides of the coil units and side surface parts covering side surfaces, the side surface parts of the second sheet are made to abut against side surfaces of the coil units by bending boundaries with the other surface part, and outer edge parts of the side surface parts of the second sheet and outer edge parts of the first sheet are joined.