We report a case of maxillary sitting of a calcifying odontogenic epithelial tumor (Pindborg's tumor). It is a benign tumor with similar microscopical findings with the ameloblastoma although its natural evolution is different. The tumor has an actodermal odontogenic origin. The stem cell from which it develops and its growth stimulus are unknown. Although the intermediary stratum of the enamel producing organ has been incriminated. A swelling of the maxillae or a casual finding--as the case reported--are the most common manifestations at beginning of these cases. The differential diagnosis depends on the radiological pattern we may find. Various surgical procedures may be considered optional. It could vary from enucleation to complete resection of the affected structure. Aggressive surgery is not indicated.