Also, a third wire portion 85 is disposed between the lower end of the first wire portion 83 and the lower end of the second wire portion 84. The third wire portion 85 is formed in an S-shape by linking five linear parts together. Here, these five parts will be referred to as first, second, third, fourth, and fifth parts 85a to 85e in the stated order starting from the first wire portion 83 side. Specifically, the first, third, and fifth parts 85a, 85c, and 85e are disposed so as to extend across the opening 43, and these parts constitute main body portions according to the present invention. Also, these first, third, and fifth parts 85a, 85c, and 85e refer to portions located in the opening 43. Also, these three parts 85a, 85c, and 85e are inclined at an angle α of 30 degrees or less with respect to the horizontal direction. This is because, if the heating wire 8 extends in the horizontal direction when images of the outside of the vehicle are taken by a camera and image processing is performed, for example, the heating wire 8 blocks all of the pixels on a scanning line extending in the horizontal direction. Also, the windshield is installed in an inclined state, and thus if the heating wire is disposed at an angle that is larger than 30 degrees with respect to the horizontal direction, the inclination of the heating wire may be emphasized to appear larger, which may hinder the ability to acquire information.