Coarctation of the aorta usually occurs just distal to the origin of the left subclavian artery, but may involve proximal to this vessel. One unusual type of coarctation of the aorta which located proximal to the left subclavian artery is presented. The patient was 23 year old soldier whose primary complaints were occipital headache and dizziness. Examination showed a unilateral hypertension in the right arm. The aortogram demonstrated coarctation between the left common carotid artery and left subclavian artery. On Jun. 14, 1983, patch graft aortoplasty was performed but failed due to pliable poststenotic aortic wall. And bypass graft from origin of the left common carotid artery to the descending thoracic aorta was performed. Postoperative course was uneventful for 4 months follows up periods. We now report a unusual type of coarctation of the aorta and its surgical treatment.