Schwannomas of the sacrum are extremely rare. We report a 56-year-old patient who only clinically reported difficulty was sciatica. The imaging studies carried out showed a sacral tumor of a posterior location without an erosive character of the bone, which impressed initially as a Schwannoma. The patient underwent a posterior approach with partial resection of the lesion (80%). The histological report of the Department of Pathology was schwannoma. The postoperative evolution is being satisfactory.