Elachista canapennella is a moth of the family Elachistidae found in Europe.

Forewings in male pale grey irrorated with black, in female blackish except on basal area; a somewhat oblique fascia before middle, a tornal spot, and triangular costal spot somewhat beyond it in male very indistinct, whitish, almost obsolete, in female broader, white, conspicuous.

[2][3] [4] Adults are on wing from April to June and from July to September.

The larvae feed on creeping bent (Agrostis stolonifera), false oat-grass (Arrhenatherum elatius), Avenula pubescens, tufted hairgrass (Deschampsia cespitosa), fescue (Festuca species), creeping soft grass (Holcus mollis) and meadow-grass (Poa).

This article on a moth of the genus Elachista is a stub.