Osteoma is an uncommon benign slow growing neoplasm of the bone, characterized by proliferation of osteoblasts forming bone trabeculas in a connective tissue stroma. After paranasal sinus, mandible is its second most frequent location. The osteoma can be central, peripheral or of extraskeletal type. Peripheral osteomas are quite uncommon. This fact suggests that peripheral osteoma of the mandible may be traumatically damaged, mostly because of muscle traction. This paper reports a case of peripheral osteoma located in the mandible. The patient underwent a multi-detector-row computed tomography (MDCT) in order to plan corrective surgery. MDCT images were post-processed with volume rendering techniques.