Background Pulpectomy is the treatment of choice for primary teeth with inflamed pulp resulting from caries or trauma. The clinical success of pulpectomy procedure is determined by the aseptic root canal preparation and hermetic seal of the root canal system. The success is also influenced by appropriate case selection, mixing of the obturation material and usage of proper technique for obturation. Aim To compare the quality of obturation using three different obturation techniques in primary mandibular molars using Endoflas as obturating material. Materials and Method The present study is a single blinded randomized clinical study conducted in 90 children between the age group of 4 and 8 years of age requiring pulpectomy in primary mandibular molars. In group 1 obturation was done using Engine driven lentulospiral in 30 teeth, in group 2, obturation was done using hand held lentulospiral in 30 teeth and in group 3, obturation was done using reamer with Endoflas as obturation material. Post-operative radiograph was taken and evaluated for the quality of obturation in terms of length of obturation, presence of voids and time taken for obturation wasrecorded. Independent t test and Chisquare test was performed.