Acompsia cinerella is a small lepidopteran species of the twirler moth family (Gelechiidae). It is the type species of the genus Acompsia, once assigned to the subfamily Anacampsinae but generally placed in the Dichomeridinae.
It is found in most of Europe, except for Portugal and Iceland.
The wingspan is 16–19 mm. Adults are on wing from June to July.
The larvae probably feed on moss, often at the base of a tree.