[Problem] To provide a coating composition, which can reduce a load to the environment and form a cured layer having corrosion resistance, antifouling property and high transparency.[Means for Solution] A coating composition comprising (A) a polysilazane having alkoxy-modified silane group in a side chain, (B) non-reactive polydialkylsiloxane and (C) reactive polydialkylsiloxane, and a obtained cured layer therewith.