Vertebral artery dissection, which usually follows minor cervical trauma, is an uncommon but important cause of circulatory disturbance in the poste-rior cranial fossa. Clinical assessment including detailed history-taking, and physical examination and imaging study is critically important for early detection of this disease. In addition to early diagnosis, treatment with anti-coagulatn and antiplatelet drugs is the key to achieving a better prognosis. In 1997, we encountered a 14-year-old boy with vertebral artery dissect-tion. He had experienced accidental strangulation of the neck in a violent event 2 days before presentation. Acute-onset vertigo, nausea, and right hemiparesis were the initial symptoms. After treatment with anticoagulant and antiplatelet agents, his neurologic deficits recovered gradually without obvious sequelae. In conclusion, we suggest that vertebral artery dissection be suspected if acute vertigo follows cervical trauma.