Coleophora didymella is a moth of the Coleophoridae family. It is found in southern France and Italy. The larvae feed on Centaurea scabiosa. They create a large, dark yellow-brown, composite leaf case of 15–17 mm long. It is composed of two leaf fragments placed behind each other. The case is laterally compressed and the mouth angle is about 20°. Larvae can be found from summer to the next spring.