Coleophora cartilaginella is a moth of the Coleophoridae family. It has a disjunct distribution. It has been recorded from the Iberian Peninsula, northern Russia, Hungary, Ukraine, Serbia and the Republic of Macedonia. It is also known from southern Russia, central Asia, Iran and Afghanistan. Adults are on wing in June. The larvae feed on Astragalus albicaulis and Medicago species. They create a straw-coloured pistol case of up to 16 mm long. The mouth angle is about 45°. Larvae can be found from autumn to June of the following year.