The present invention relates to a composition for forming a self-healing coating layer, comprising a reversible covalent compound containing a (thio)urea functional group comprising one or more sterically hindered thio(urea) bonds and a (meth)acrylate-based or vinyl-based functional group bonded to the (thio)urea functional group; a photoinitiator; and an organic solvent, a coating film prepared from the composition, a coating film comprising the coating film, and home electronics and display devices comprising the coating film.