Elaphoidella plesai n. sp. is described from material collected from cave waters of Austria. According to Apostolov (1985) the new species fits the gracilis group of Elaphoidella s. str., being close to Elaphoidella stammeri Chappuis, 1936. It differs from the nominate species, as well as from other congeners in the same group, by the distinctive morphology and setation of caudal rami, and by the unusual armature of leg 5.