To solve the problems that a merchandise value is lost since a nail main body is swollen and deformed and the entire nail does not uniformly emit light since a space part increases in the conventional artificial nail.

A clearance not causing a capillary phenomenon is secured at the inner side joined part of the lower side wall and upper side wall of a light-transmissive, flexible and tightly-sealed hollow container whose cross section is crescent-shaped, one of two kinds of compositions to present chemical light emission by being mixed is filled in a breakable glass ampule inside a center thickest part inside the tightly-sealed hollow container, and the other composition is filled inside the tightly-sealed hollow container on the outer side of the glass ampule.

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