Elachista brachyplectra is a moth in the Elachistidae family. It was described by Meyrick in 1921. It is found on Java and in Sri Lanka and southern India. The wingspan is 5-6 mm. The forewings are dark fuscous, slightly speckled with whitish and there is a short rather oblique white streak from the middle of the costa and a subdorsal dot beneath it. There is a white dot on the tornus, and a dot or short oblique streak on the costa rather beyond it. The hindwings are grey.