PURPOSE: To provide a method for applying an antifogging film by which the antifogging film can surely and simply be applied to a surface for application.

CONSTITUTION: The method for applying an antifogging film is to wipe off foulings on the surface for application, sufficiently spray water on the surface, subsequently peel a protective film 3 on the back surface of the antifogging film processed to a required size, apply the antifogging film to the surface, then push water and air on the surface for the application to the outside and peel a surface protective film 4.