Volumetric caudal epidural injections of steroid have recently been done in patients with acute or chronic lumbago and sciatica. This method is easier way of sending steroid to the sacral nerve root than lumbar epidural injections. The Cauda equina syndrome is a rare complication of epidural pain block. We report on a case in which an emergency laminectomy was done because cauda equina syndrome occurred just after a volumetric caudal epidural steroid injection in a patient with a herniated interverterbral disc.