Elachista eurychora is a moth in the Elachistidae family. It was described by Meyrick in 1919. It is found in New Zealand. The wingspan is about 13 mm. The forewings are pale brownish ochreous with a costal streak of dark-fuscous irroration from the base to near the apex, and a similar somewhat narrower dorsal streak attenuated to the extremities from the base to near the tornus. The hindwings are dark fuscous.