Nemapogon granella (European grain worm or European grain moth) is a species of tineoid moth. It belongs to the fungus moth family (Tineidae), and therein to the subfamily Nemapogoninae. It is the type species of its genus Nemapogon, and via that also of the subfamily Nemapogoninae. It is also the type species of the proposed genera Brosis (as established by J. Hübner, a junior homonym and thus invalid) and Diaphthirusa, which are consequently junior objective synonyms of Nemapogon.