Eupelmidae Walker, 1833, belongs to the superfamily Chalcidoidea, with more than 1,000 described species within48 genera worldwide. They are distinguished from other families as following characters: females and some males withlarge and undivided mesopleuron; gaster subsessile; male antenna with seven funiculars and only single anellus.Most species of this family are idiobiont ectoparasitoids or predators of the immature stage of Coleoptera, Homoptera,Lepidoptera, Neuroptera, Orthoptera and even other Hymenoptera, or some species are endoparasitoids of eggs of Araneae,Dictyoptera, Hemiptera, Lepidoptera, Orthoptera and Phasmida.In this study, history, descriptions, photos of habitus and a key to genera and species of South Korean Eupelmidaeare provided.