Ancylosis faustinella is a species of snout moth in the genus Ancylosis. It was described by Zeller, in 1867 from Palestine, but is also found on Malta and in Russia, as well as on the Canary Islands, in Algeria, Tunisia, Libya, Morocco, Egypt, Saudi Arabia, Yemen, Bahrain, Turkey, Afghanistan, Syria, Iran, Israel, Jordan, Lebanon, Mongolia, Pakistan, Niger and Sudan.
Adults are small, with narrow ochreous yellow forewings. It has a white costal streak and two white transverse lines. The hindwings are pale grey.