The calcifying odontogenic cyst is rare lesion having features of both cyst and neoplasm. Clinically it frequently occurs in young adult and more frequent in the anterior area of the jaw. Radiographically, this lesion has several radiopaque foci within unilocular or multilocular radiolucency. The authors experienced cystic and neoplastic types of calcifying odontogenic cysts in the anterior area of the mandible in a 16-year-old male and 21-year-old female patients who suffered from pain, swelling and teeth displacemeent on the affected area. And we discussed the clinical, radiological and histopathological features with a brief review of the literatures.