Disclosed is a stain-proof coating composition which does not contain copper or any copper compound (e.g., cuprous oxide) and therefore enables the production f a stain-proof coating iilm that does not undergo discoloration or cracking caused by ultraviolet ray or moisture, can have a low VOC and long-term antistain properties at high levels simultaneously, and has excellent mechanical strength. Specifically disclosed i s a two-part hydrolysable stain-proof coating composition which com prises two liquids, i.e., a first component comprising a polyester resin and a paste-like second component con taining zinc oxide, wherein the solid content in the polyester resin has an acid value and a hydroxy value of 50-200 mgKOH/g and 100 mgKOH/g, respectively, the polyester resin has a viscosity o f 500 mPa-s or less at 2 5 , and wherein the coating composition is character ized in that the content of a volatile organic compound is 400 g L or less relative to the total amount of the first and second components, and copper or any copper compound is not contained.
