An object of the present invention is to provide a coating agent capable of giving a coating film having excellent adhesion to the base surface, and exhibiting excellent releasability with good surface lubricity. The coating agent comprises a water-base resin composition containing the following components A and B: component A: a curable silicone composition composed of: component (A-1): an organopolysiloxane in which a group selected from among a hydroxyl group and groups represented by the formula R.sup.1O-- (where R.sup.1 is a monovalent hydrocarbon group having 1 to 6 carbon atoms), and a group represented by the following formula (1): ##STR00001## are bonded to the same silicon atom at two or more terminals of the polysiloxane chain, component (A-2): an alkoxy silane compound or a partial hydrolysis-condensation product thereof, and component (A-3): a condensation catalyst in an amount of 0 to 10 mass parts per 100 mass parts of the total amount of the components (A-1) and (A-2); and component B: a polyurethane resin.