Abstract: The present invention provides a coating apparatus capable of coating an object with a highly viscous material at high precision in the applied amount of the highly viscous material and uniformity in the shape of the applied highly viscous material layer. The present invention relates to a coating apparatus capable of coating an object such as the metal sheet of an automobile body with a highly viscous material such as a coat type metal sheet-reinforcing material, at high precision in the applied amount (or the thickness of the applied material layer) and uniformity in the shape of the applied viscous material layer, so as to ensure the reliable reinforcing effect of the reinforcing material. The present invention also pertains to a coating method using the same apparatus, and a coated article provided by using the same apparatus.