A window glass anti-fogging structure includes an anti-fogging membrane and a heater. The structure is provided on a view-angle glass surface of a window glass of a vehicle such that the structure covers the view-angle glass surface. The view-angle glass surface is a part of an inner surface of the window glass within a range of an angle of view of a vehicle-installed camera provided in a vehicle interior space for taking images of a view outside of the vehicle through the view-angle glass surface.