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