An amine curing component which can be used with various types of prepolymers including a urethane prepolymer having a reactive functional group of highly reactivity is provided. Also provided is a curable resin composition containing such curing component. This curable resin composition exhibits good surface and depth curability in the curing, and adjustment of pot life is also easy. The curing component contains an amino group-containing compound (A), a ketone compound (B), a ketimine compound (C), and water (D), and the curable resin composition contains this curing component.