The species of the genus Elasmostethus Fieber, 1860, belonging to the family Acanthosomatidae, occurring in the KoreanPeninsula are reviewed. Through this study, six species are recognized; the occurrence of four previously recorded species,including E. brevis Lindberg, 1934, E. humeralis Jakovlev, 1883, E. interstinctus (Linnaeus, 1758), and E. nubilus (Dallas,1851) are confirmed; two species, E. rotundus Yamamoto, 2003, and E. yunnanus Hsiao & Liu, 1977, are recorded forthe first time from the Korean Peninsula. The record of E. kansuensis Hsiao & Liu, 1977, is based on misidentificationof E. yunnanus. Therefore E. kansuensis is deleted from the Korean fauna. Photographs of habitus and genital segmentsof the two newly recorded species are included, and diagnoses and a key to the Korean species are provided.