Eupanacra busiris is a moth of the family Sphingidae. It is known from Malaysia (Peninsular, Sarawak), Indonesia (Sumatra, Java, Kalimantan, Sulawesi), Nepal, north-eastern India, the Andaman Islands, Myanmar, Thailand, southern China, Vietnam and the Philippines. Probably also in Sri Lanka. Adults are on wing from late March to late August in Hong Kong. They fly at dusk and are attracted to the flowers of Duranta erecta. The larvae have been recorded on Lasia species and Pothos scandens in India.