Elachista bidens

{{Short description|Species of moth}}

{{Speciesbox

| genus = Elachista

| species = bidens

| authority = Kaila, 2011

}}

Elachista bidens is a moth of the family Elachistidae that is found in Western Australia.{{cite book|url=https://books.google.com/books?id=flsAVRnbaA4C&pg=PA104 | page=104 |author=Lauri Kaila|title=Elachistine Moths of Australia: Lepidoptera, Gelechioidea, Elachistidae|publisher=CSIRO|work=Monographs on Australian Lepidoptera|date=7 June 2011|volume=11|isbn=9780643103054}}

The wingspan is about {{convert|10.6|mm}} for males and {{convert|12.7|mm}} for females.