Abstract :We report osseous choristoma on the 31 and 41 teeth lingual periodontium region. A 22-year-old female patient was disturbed by abnormal growth on the lower jaw. There was no pain. The lesion was wellcircumscribed, nonmotile, and peduncled mass. She has been orthodontic treatment before five mounth. The lesion was not symptomatic, but, the lesion started to keep from mastication. The mass was removed by diode laser (Epic, Biolase, Irvine, CA, USA; 810 nm wave length, 10 W power) under local anesthesia. In microscopic examination, under squamous epitelium, the presence of mature bone structure. The excised specimen was confirmed by the pathologist as osseous choristoma. In this case report, trauma is considered a possible etiological factor. Osseous choristoma of the periodontium is extremely rare with only one case reported in the Indian literatüre so far. The number of reported cases or literatures is insufficient, to review this particular type of osseous choristoma and adds to the existing knowledge of the condition.