Anatomic variation in the radicular morphology is a common developmental abnormality. It is usually seen as an additional number of roots and root canals. However, these anomalies are rarely seen in primary mandibular first molar. In order to determine the success of any dental treatment, thorough knowledge of anatomical variations and correct diagnosis of prevailing conditions of the affected tooth/teeth is a prerequisite. This paper presents case series of three rare case reports of three–rooted primary mandibular first molars and their management.