The present invention provides a curable resin composition for coating natural or artificial nails, which in particular exhibits an excellent appearance after coating, high water and scratch resistances, and low levels of odor, damage to nails, and dermal irritancy, resulting in a high level of safety to human bodies and superior storage stability. The curable resin composition for coating a natural or artificial nail of the present invention comprises (A) an aqueous emulsion of a polymer having functional groups polymerizable by exposure to active energy radiation, (B) polyethylene glycol, and (C) a photo radical initiator containing no nitrogen atom in its molecule.