Benign tumors of the mendible are uncommon lesions. That were classifed into odontogenic tumors andnonodontogenic tumors. Author reviewed the radiological evaluation and pathological microscopic finding from 33benign tumors of the mandible that were comfirmed by the biopsy during last 10 years in Dental Clinics, EwhaWomans University Hospital and Seoul Natinal University Dental Hospital. Following results were obainend; 1.Benign tumors of the mandible were classified into odontogenic (66.7%) and non-odontogenic tumors (33%). 2. Therange of the age distribution was between 6 years and 67 years old. The commonest age group was the seconddecade(39.4%). 3. There was no difference to sex distribution. 4. The msot frequent locatio was the body of themandible (42.4%). 5. Radiographic findings were relatively characteristic in odontogenic tumors rather thannon-odontogenic tumors. 1) Radiolucent cystic lesions-ameloblastoma, odontogneic myxoma, odontogneic fibroma,aneurysmal bone cyst and neurofibroma. 2) Radiopaque mass lesions-odontoma, cementoma and osteoma. 3) Mixedpatterns-ossifying fibroma, cementifying fibroma, calcifying odontogenic epithelial tumor and hemangioma. It wasconcluded that the radiographic examination was of value to diagnose the benign tumos of tee mandible insymptomless patients.