A 70-year-old woman was admitted to our hospital with complaints of severe dizziness and occipital headache. A right vertebral angiogram demonstrated a kinked, duplicated origin of the vertebral artery. Medical treatment was not effective, and an operative correction was attempted to improve the vertebral artery circulatory flow. The duplicate origin of the vertebral artery was confirmed at the time of surgery. Eight cases of duplicate origin of the vertebral artery in the literature are reviewed.