Triaxomera parasitella is a species of tineoid moth. It belongs to the fungus moth family (Tineidae), and therein to the subfamily Nemapogoninae. It is widespread and common in much of western Eurasia, but seems to be absent from some more outlying regions, such as Portugal and the eastern Baltic, Ireland and Iceland. It has also not been recorded from Slovenia but given that it is found in neighboring countries, it may well occur there unnoticed. Recently, the species was recorded from British Columbia. Generally, it is a moth of warm temperate regions, e.g. in Great Britain it is only a rare and scarce species from the English Midlands northwards.