The genus Ypsolopha is the most largest group belonging to Ypsolophidae which consist of over 140 described species worldwide. About 110 species are distributed in the Palearctic and Oriental Regions, 30 species in the Nearctic Region, the rest are scattred in other regions. This genus can be distinguished easily by apparent characters. Ypsolopha species has difference of morphological characters: wing venation, labial palpi and genitalia. However, because of their genital similarity between each species, this genus is monophyletic taxon(Moriuti, 1964). In 1964, S. Moriuti suggested that 4 groups of Japanese Ypsolopha can be subdivided into 4 groups: vittellus-, paranthesellus-, strigosus- and acuminatus-group. But he reorganized Ypsolopha in the Fauna Japonica, Yponomeutidae S. LAT (1977) and intergrate paranthesellus- group into vittellus-group. In the present study, we overviewed some morphological characteristics of Ypsolopha.