Eudonia sabulosellus is a moth in the Crambidae family. It was described by Walker in 1863. It is found in New Zealand. The wingspan is 20–22 mm. The forewings are pale greyish-ochreous, irrorated with white along the costa and on the dorsal half. There is a suffused blackish streak from the base along the submedian fold to the middle. The hindwings are grey-whitish, tinged with ochreous. Adults have been recorded on wing in December and January.