A root anomaly in primary canines is a rare entity. Primary maxillary canines have a single conical root, but a few bi-rooted canines have been reported previously in the literature. This report presents a unique anomaly of a primary maxillary right canine (PMRC) with three roots and its endodontic treatment. Such an anatomic variation has not been reported previously. On radiographic examination the contralateral canine and the mandibular canines were single rooted. The purpose of the present case report is to increase awareness about this morphological aberration and its clinical significance. Schlagwörter: endodontic treatment, primary maxillary right canine, root anomaly, three-rooted