Pediasia contaminella is a species of moth in the family Crambidae described by Jacob Hübner in 1796.

[1] It is found in almost all of Europe,[2] Asia Minor, the Caucasus, Transcaucasia, Iraq, Iran, the Kopet Dagh and Minusinsk.

[3] It differs from Pediasia aridella as follows : forewings without blackish submediaii streak from base, median line less oblique, with more strongly marked discal indentation, nearly parallel to second.

[4] Adults are on wing in July and August.

This article relating to the moth tribe Crambini is a stub.