Joint explorations have been carried out in North Korea for studying and collecting cultivated plants since 1985. A checklist of the cultivated plant species of the whole Korean peninsula was developed, used and updated since the beginning of the investigations. A last additional updating is provided including new entries, a summary and indexes (families, synonyms, vernacular names). The total number of taxa considered in the checklist, including infraspecific ones, is 608. On the species level it contains 581 entries belonging to 111 families and 381 genera. The number of medicinal plants is particularly high. The data are being maintained in a database. The results demonstrate the wealth of the Korean cultivated flora which is the result of a long history and a specific Korean input.