The Korean species of the genus Ypsolopha Latreille are reviewed. A total of 10 species is recognzed. mong them, three species, Y. cristatus Moriuti, Y. japonicus Moriuti, and Y. parenthesellus(Linnaeus) are recorded for the first time from Korea. Collecting data and biological informations for the species are given, and external characteristics and genital structures for he newly known species are redescribed and illustrated.