Lumbar discectomy is the most used operative technique at neurosurgery clinics around the world. The complications of lumbar disc operation include infections, dural tear, bleeding, vascular and intestinal injuries. Infectious complications of lumbar disc surgery are superficial and profound tissue infections, meningitides and epidural abscess. Although retained surgical sponges are well known intraoperative complications in other surgical branches, they have not been widely reported in neurosurgical literature. In this report we present two cases of retained surgical sponges in the operation sites and discuss them with the pertinent literature.