Purpose: In this study, we evaluated the relation between surgical methods and reccurrence rate by investigating clinical, radiological aspects and histopathological patterns of 26 patients who were diagnosed with amelobalstoma. Patients and Methods: In this study, we retrospectively investigated 26 patients who were diagnosed with ameloblastoma and treated at the Department of Oral and Maxillofacial Surgery of Chosun University Dental Hospital from January 2000 to December 2008. Results: The patients comprised 12 males (46.1%) and 14 females (53.9%), and their ages ranged from 10 to 69 years (average, 37.3 years). All cases presented a mandibular location, and in particular, 13 cases (50%) demonstrated an occurrence in the mandibular body. Clinically, 8 cases (30.8%) presented no symptoms, and the most prevalent chief complaint was swelling in 13 cases (50%). Radiographically, a unilocular type appeared in 14 cases (53.8%), and a multilocular type was observed in 10 cases (38.5%). Histopathologically, there were 8 follicular types (30.8%) and 7 plexiform types (26.9%). Conservative treatment was performed in 5 cases (19.2%), and radical treatment was performed in 21 cases (80.8%). The follow-up period ranged from 1 to 10 years. The total recurrence rate was 15.4%, and the mean duration of recurrence was 6.7 years. Three of the 5 cases (60%) that received conservative treatment demonstrated a recurrence, as compared to 1 of the 21 cases (4.8%) that underwent radical treatment. Conclusion: The radical treatment was more effective than the conservative treatment for recurrence prevention. We should consider a continuous follow-up check after operation.