We experienced a case of lumbar epidural lipomatosis patient who had been treated with several epidural steroid injection for the management of lower back pain. This 67-years-old man, complained of lower back pain and radiating paresthetic pain to the dorsum of left foot. Epidural lipomatosis is a rare condition of focal or multiple deposition of excessive adipose tissue in epidural space. Since excessive deposited adipose tissue compresses the spinal cord or spinal root, patients complaint the atypical low back pain and low extremity radiculopathy which mimics the symptoms of spinal stenosis or herniated nucleus pulposus. In managing of lower back pain patient, especially who had been treated with steroid previously, we should consider that epidural lipomatois would be one of the cause.