The present invention relates to a curable composition and use thereof, and more particularly, to a curable composition and use thereof, the curable composition comprising: (a) a compound capable of changing to a quinone compound by oxygen; (b) an amine-based polymer; and (c) an oxygen clathrate structure. The curable composition is rapidly cured and can be cured not only at the interface of a conventional film but also inside the film, and thus, the curable composition has uniform physical properties and excellent physical properties throughout the film, as compared to a cured film cured at an existing interface.