Background: To study etching patterns of sodium hypochlorite pretreated hypocalcified amelogenesis imperfecta primary molars. Materials and methods: The present study was conducted in the Department of Pedodontics of the dental institutions. The ethical clearance for the study was approved from the ethical committee of the hospital. For the study, we collected 20 primary molars from children affected with hypocalcified AI near their time of shedding. Teeth were immediately washed under running water to remove any blood or adherent debris. The selected teeth were then preserved in distilled water at room temperature. Each tooth was sectioned buccolingually into two halves using high-speed double-sided diamond disc. The 20 specimens obtained were encoded for identification. Results: Type I etching is seen in 44 patients for Group 1 and 78 in group 2. Type II etching was seen in 19 patients. Conclusion: treatment of primary teeth affected by hypocalcified AI using 5.25% NaOCl prior to phosphoric acid etching significantly improves the etching pattern which is required for good resin bonding.