Ameloblastoma or admantinoma is a benign odontogenic tumor of epithelial origin. It is rare tumour occurring in the jaws which constitutes 1–3% of all cysts and tumours of jaw with locally aggressive behavior & high recurrence rate. The tumor is by far more common in the mandible than in the maxilla. A unilocular or multilocular radiolucency with a honeycomb or soap bubble appearance is the most striking feature. Sometimes ameloblastoma is indistinguishable from a dentigerous cyst. We present a case report of ameloblastoma of right posterior maxilla in a 35 year old male.