The present invention concerns an antifog coating formed on a transparent base material. This coating consists of a urethane resin of 20 to 40 wt% water absorption coefficient, the urethane resin derived from an acrylic polyol of 1000 to 4000 average molecular weight and a polyoxyalkylenepolyol of 400 to 5000 average molecular weight. The coating is used in an indoor environment having means for,after water absorption saturation of the coating, carrying out compulsory dehydration of the coating, which coating is an antifog coating characterized by forming no water film at the time of antifogactivity manifestation.