The terrestrial leeches from the peripheral island of the Korean Peninsula were identified as Haemadipsa rjukjuana Oka, 1910. The arhynchobdellid family Haemadipsidae and H. rjukjuana are newly added into the Korean leech fauna. This species is blood-feeding leech that attacks birds and medium or large sized mammals primarily, including human. The sequence of mitochondrial cytochrome c subunit I (COI), and the additional biology for this species are presented. This is the first study of terrestrial blood-feeding leeches in Korea.