Ameloblastic FIBROMA is a rare mixed odontogenic tumor [1, 2]. The average age of affliction is 15 years old [3]. Tumor growth is slow and painless and leads to an expansion of jaws and migration and displacement of teeth and it is often asymptomatic [2, 3]. Several cases of malignant transformation to Ameloblastic fibrosarcoma (AFS) have been reported [4]. The patient was a 5-year old boy complaining of toothache in left part and acute swelling. In the radiological examination (Fig. A-1), soap bubble multilocular radiolucent lesion was found in the area between D, E, and 6 teeth of the left side of mandible. Radiolucency limit was specified and a thin sclerotic margin was found around the lesion. The lesion had caused posterior displacement of the tooth bud 6. The tooth bud 5 was missing and no change was found in the lamina dura of any of the teeth of the involved area. Considering the child’s age, the most probable clinical diagnoses were dentigyrus cyst and ameloblastic FIBROMA. In histopathology, the second case was proved (Fig. 2). The mass was completely enucleated and in the next six month follow-up, no symptom of recurrence was found (Fig. B-1).