The Rivellia syngenesiae species group from Korea is taxonomically studied. As a result, The following species are recognized: R. alini Enderlein, R. mandschurica Hennig, R. parilis Frey, R. tridentata Byun et Suh sp. nov., R. harai Byun et Suh sp. nov., and R. longialata Byun et Suh sp. novo Among these species, only R. mandschurica has been previously known from Korea. These six species belong to the R. syngenesiae species group, which can be characterized by the base of apodemal lobe distinctly separated from imaginary line connecting the bases of lateral arms when viewed from ventrally. A key, descriptions, and illustrations are provided for these species. In addition, we designated a lectotype for R. charbinensis Enderlein, which was examined for a comparison with the closely related R. parilis.