It is an object of the present invention to provide an artificial nail composition having excellent stability over time and excellent surface gloss, removability, adhesion, and water resistance of an artificial nail obtained thereby, an artificial nail employing the artificial nail composition, a method for forming an artificial nail, a method for removing an artificial nail, and a nail art kit.An artificial nail composition comprising (Component A) an ethylenically unsaturated group- and primary amino group- and/or secondary amino group-containing compound, and (Component B) a photopolymerization initiator. Furthermore, Component A is preferably a specific compound represented by Formula (I) and/or a compound represented by Formula (II)