Cementoblastoma or benign cementoblastoma is the only true benign neoplasm of cementum origin derived from ‘Mesenchyme or odontogenic ectomesenchyme, with or without odontogenic epithelium. The cementoblastoma is a relatively rare odontogenic neoplasm of the jaws comprises 1% to 6.2% of all odontogenic tumors. It is characterized as a large mass of cementum or cementum-like tissue attached to the roots of an erupted permanent tooth and very rarely being attached to the primary tooth. We are presenting here an incidental finding of cementoblastoma in a 10 year old male patient attached to the root of primary second molar.