PROBLEM TO BE SOLVED: To provide a photocurable artificial nail composition that does not cure, does not cause an increase in viscosity, and does not deteriorate coatability, even after being stored in an once-opened container containing the photocurable artificial nail composition after long-term storage.SOLUTION: According to the present invention, there is provided a photocurable artificial nail composition comprising a urethane (meth) acrylate oligomer, a (meth) acrylate monomer, a polyfunctional thiol compound, a polymerization initiator, and a polymerization inhibitor. Here, the content of the polymerization inhibitor is 500-5,000 ppm.SELECTED DRAWING: None【課題】一旦開封した光硬化性人工爪組成物入り容器を長期間にわたって保存しても、硬化することがなく、粘度が上昇して、塗布性に劣ることがない光硬化性人工爪組成物を得ること。【解決手段】ウレタン（メタ）アクリレートオリゴマー、（メタ）アクリレートモノマー、多官能チオール化合物、重合開始剤、及び重合禁止剤を含有し、該重合禁止剤の含有量が５００～５，０００ｐｐｍである光硬化性人工爪組成物。【選択図】なし
