The genus Eriborus which is a small-sized campoplegine genus was firstly described by Föster in 1869 based on Campoplex perfidus. Members of this genus included 52 species in the world. Among them, 11 species are distributed in Eastern Palaearctic region, and only two species, E. molestae (Uchida, 1933) and E. terebrans (Gravenhorst, 1829) have been recorded in Korea(Yu et al., 2005). Most species of this genus are specialized parasitoids of 17 lepidopteran families, Cerambycidae(Coleoptera) and Tenthredinidae(Hymenoptera), and more particularly attack most of Noctuidae and Pyralidae(Lepidoptera) larvae as koinobiont endoparasitoids. This genus is easily distinguished from other campoplegine genera by the combination of the following characters: Carinae of propodeum usually strong, areola longer than wide; propodeal spiracles circular or short elliptic; fore wings without areolet; thyridium subcircular or longitudinally elliptic. In this study, we found two newly recorded species, Eriborus vulgaris (Morley, 1913) and Eriborus sinicus (Holmgren, 1868) from Korea. A revised key to the species of Korean Eriborus Föster, redescriptions and photographs of diagnostic characters are provided.