In the course of taxonomical study on the oribatid mites of Korea, a new species, Damaeus (Hypodamaeus) barbatulus sp. n., belonging to the subgenus Hypodamaeus is described. This new species are easily distinguishable from other known congeneric members by the small body size (475 x $302mu extrm{m}$); long, undulate, and glabrous sensilli; propodolateral apophysis of thum-like with parallel sided and directed antero-laterad present; tectum of podocephalic fosa (t) well developed; all notogastral setae (except pseudanal setae with smooth) thinner, medium length and roughened densely with rather long barbs; all ventral setae minutely roughened and tibia of leg II with 4 setae.