An embodiment of the present invention relates to a curable composition containing (A) a polyoxyalkylene-based polymer having a silicon-containing reactive group, (B) a (meth)acrylic ester-based polymer having a trialkoxysilyl group, and (C) a specific silane compound having a guanidine group. Because a nonorganotin-based catalyst is used for the curable composition of an embodiment of the present invention, the curable composition has excellent miscibility among the components, tends less to suffer a defect caused by transfer of a catalyst, is excellent in curability and adhesiveness, and, when cured, yields a cured product having excellent mechanical performance.