There is provided a curable composition being free from coloration and having excellent curability, adhesion and weather resistance by use of a non-organotin catalyst.A curable composition comprising (A) a polyoxyalkylene polymer and/or a (meth)acrylate polymer containing a silicon-containing group being capable of crosslinking by forming siloxane bonds, (B) a titanium chelate coordinated with .beta.-ketoester, and (C) a photostabilizer, wherein a main component of the photostabilizer (C) is a photostabilizer (C-1) having no benzotriazole ring.