Mocis frugalis (Fabricius, 1775), the sugarcane looper, was collected in Byeonsanbando National Park in South Korea for the first time. This species is known as a major crop pest, especially to sugarcane at tropical and subtropical regions. Due to climate change and the subtropicalization of the southern part of the Korean Peninsula, some tropical and subtropical crops are cultivated in Korea, including sugarcane. Besides, Oryza sativa L. and Zea mays L., which of main crops in Korea, are known as host plants of M. frugalis in the Oriental region. Even if unclear of domestic settlement, precision monitoring will be necessary.