Endotricha mesenterialis is a species of snout moth in the genus Endotricha. It was described by Walker in 1859. It has a wide distribution and is known from Austral Island, Australia, the Kermadec Islands, New Caledonia, New Guinea, Palau, Samoa, Tahiti, Begum Island, Christmas Island, India, Indonesia (Borneo), Malaysia, the New Hebrides, the Nicobar Islands, Sri Lanka, Tonga, Taiwan and China (Guangdong, Sichuan, Zhejiang). The winglength is about 10 mm. Adults are brownish-purple, with a pale band across each wing.