PROBLEM TO BE SOLVED: To provide an OA roller which does not cause any trouble due to a viscosity modifier added to a coating agent and prevents a coating layer formed on a peripheral surface of a metallic roller body from being abraded, deformed, adhered to a belt or the like or peeled off in a short time to maintain a good property over a long term, and to provide an OA roller coating agent which has excellent storage stability as well as suitability for forming the coating layer of the OA rol...