Ossifying fibroma is a benign tumor that rarely affects the face bones and exclusively the maxilla. We report two cases of ossifying fibroma of the maxilla treated in our department of maxillofacial surgery and stomatology at IBN SINA university hospital in Rabat. The 1st case is a 38-year-old female, with no particular history, who presented a progressive swelling of the left face since 05 months. Extraoral examination demonstrated a grade I left exophthalmos, without diplopia or limitation of eye movements. Intraoral examination revealed a vestibular expression of the tumor. The 2nd case is also a 45-year-old female, who presented a progressive swelling of the left maxilla which gradually increased in size over a period of 04 months. Intra-orally, the buccal vestibule was completely obliterated with the mass. The two patients presented radiological images of similar density, made of a heterogeneous tissue of the maxillary containing calcifications but with different extension. Surgical excision was performed in both patients and the diagnosis was confirmed by histological study of the resected specimen. The evolution of the ossifying fibroma is insidious; this pathology has a clinical polymorphism and a good prognosis. The etiopathogenesis of this tumor is still unknown, it’s more likely to develop in the mandible and very rare in the maxilla. It differs from other types of fibroma by their clinical, radiological and histological aspects. However, only the pathological examination confirms the diagnosis.