As a result of survey on the Lepidoptera Yeongsil area Mt. Hallasan National Park, Jeju Island, Totally of 292 species in 22 familes of the Lepidoptera were identified and listed. Among them, eleven species are newly added to the Lepidoptera fauna of Jeju Island; Apotomis vaccini Kuznetsov, 1969, Olethreutes transversana (Christoph, 1881) and Pandemis heparana (Dennis et Schiffermuller, 1775) of Tortricidae, Calamotropha okanoi Bleszyski, 1961, Hypsopygia kawabei Yamanaka, 1965 and Pempelia ellenella (Roesler, 1975) of Pyralididae, Tethea consimilis (Warren, 1912) of Thyatirida, Dysstroma citrata (Linnaeus, 1761) and Pseudepione marginaria (Wilemann, 1911) of Geometridae, Hypena stygiana Butler, 1878 and Xestia tabida (Butler, 1878) of Noctuidae. These results may reflect that the natural environment of Yeongsil area is relatively specific on this island and well conserved.