<p>A curable composition which has improved compatibility between a high-molecular polyether polyol and a vinyl polymer and attains excellent mechanical properties. The curable composition comprises a polyether polymer (I) having at least one crosslinkable functional group and a number-average molecular weight of 10,000 or higher and a vinyl polymer (II) which is compatible with the polyether polymer (I) and has at least one crosslinkable functional group at a polymer end. Examples of the vinyl polymer (II) include butyl acrylate/ethyl acrylate/octadecyl acrylate copolymers.</p>
