To provide a glass surface coating application method for a coating material capable of preventing the adhesion of the dust contained in rain water to a glass surface.

This glass surface coating application method for the coating material consists in applying the water repellent coating material 2 approximately perpendicularly onto the glass surface 2 facing the outdoor air and allowing the rain water flowing down on the glass surface 2 along the water repellent coating material 2 coated in approximately the perpendicular direction, thereby preventing the adhesion of the dust contained in the rain water to the glass surface 2.