Schwannoma is a benign neoplasm originating from Schwann's cell. It involves neurons and axons of peripheral nerves. This tumor has a predilection for the head and neck region, and often occurs as soft tissue lesion. Intraosseous sheath tumors are rare, comprising less than 1% of all bone tumors; the mandible is the most common site. The literature reports only 30 acceptable cases of schwannoma of the mandible. We report a new case of schwannoma that is unusual in its intraosseous localization and the patient's comparatively young age.