Most bat species in Korea represent the Family Vespertilionidae. Twenty species and eight genera within the Vespertilionidae occur in Korea. We considered other records of two species, Eptesicus kobayashii and Pipistrellus pipistrellus as erroneous identifications. Therefore, we omitted the two species from our checklist. Kishida and Mori (1931) listed Pactia morii from Korea without any description or explanation. Although Ellerman and Morrison-Scott (1951) mentioned the species present in Korea as a synonym of Myotis ricketti, no evidence supports the presence of Pactia morii or Myotis ricketti. Eventually, we list 20 vespertilionids with valid information supporting their occurrences in Korea.