Elachista subocellea is a moth of the Elachistidae family. It is found from Fennoscandia to the Iberian Peninsula, Italy and Romania and from Ireland to Poland. The wingspan is 8–10 millimetres (0.31–0.39 in). Adults are on wing from June to July. The larvae feed internally on leaves of Brachypodium sylvaticum and Brachypodium pinnatum. First, the larvae create a narrow ascending corridor. The direction reverses and the mine develops into a broad, greenish, inconspicuous blotch, reminding of a tentiform mine. Pupation takes place outside of the mine.
