Five species of the Laboulbeniales, including two unrecorded species are reported from South Korea. They are as follows; Dioicomyces anthici Thaxter on Anthicus confucii Marseul, Laboulbenia melanaria Thaxter on Anisodacthius tricuspidatus Morawitz, L. philonthi Thaxter on Philonthus wuesthoffi Bernhauer, Peyritschiella japonicus Terada on Philonthus japonicus Sharp, and Scaphidiomyces baeocerae Thaxter on Scaphisoma unicolor Achard. Among these species, L. melanaria Thaxter, S. baeocerae Thaxter and the male thallus of D. anthici Thaxter are newly described from South Korea. L. Philonthi Thaxter and P. japonicus Terada are newly collected in some places where were unlike with the examined region ago.