This study is performed to report that oriental medical treatment was effective to the patient with piriformis syndrome after traffic accident. The patient was diagnosed as piriformis syndrome by considering clinical symptom, clinical history, physical examination, radiologic study and NCV EMG study. We applied acupuncture, herbal medicine, cupping, Chuna manipulation and exercise to the patient. After treatment, VAS decreased, and physical examination sign was disappeared. This result suggest that oriental medical treatment can be effective to piriformis syndrome.