Catoptria fulgidella is a species of moth in the Crambidae family. It is found in most of Europe, except Ireland, Great Britain, Ukraine, Slovenia, Croatia and Bulgaria. The wingspan is 22–29 mm. Adults have been recorded from June to August. The larvae feed on Carex (including Carex arenaria), Gnaphalium (including Gnaphalium dicicum) and possibly Antennaria and Festuca species.