Abdominal aortic aneurism can cause lower back pain that is usually severe, constant, and unaffected by posture. However, back pain caused by abdominal aortic aneurysm associated with radiating pain to the lower extremities can lead to a misdiagnosis. We pre-sent a rare case of a huge abdominal aortic aneurysm with chronic lower back pain. It presented as a radiating pain which was sus-pected as disc disease. Radiologic examinations, however, revealed a huge abdominal aortic aneurysm. After bypass operation, both back pain and radiating pain disappeared without any other orthopaedic management.