To provide a method to remove coated materials that remain a lot on a roller coating machine in a short time with a simple and easy way without worsening working conditions.

In removing coated materials composed of viscous liquid materials that remain on a roll of a roller coating machine, a powder that does not dissolve into the coated materials is added to them remaining on the roll. After that, the roll is continuously rotated to mix the powder with the coated materials until the materials lose their liquidity. Then, such coated materials are removed.