AbstractBenign cementoblastoma is a rare benign odontogenic tumour of mesenchymal origin. A case of a 24‐year‐old man with benign cementoblastoma is presented. The lesion manifested as a round, radiopaque mass attached to the root of the left first molar of the mandible. The tooth was extracted and the lesion was removed. A diagnosis of benign cementoblastoma was made microscopically. There has been no evidence of recurrence during the three‐year follow‐up period. A review of the literature and a discussion of the histologic feature of this case are i