Background: Caudal analgesia is a good, reliable and easy method to provide intraoperative and postoperative analgesia in the infraumbilical surgery in paediatrics. This study aimed to compare perioperative analgesic efficacy, intraoperative hemodynamics and postoperative side effects of dexamethasone added to caudal ropivicaine in paediatric patients undergoing infraumbilical surgery. Methods: This study was conducted on 60 patients (30 in each group), either gender, age 1to 7yrs, ASA I to III, schedule for lower abdominal surgery. After giving general anaesthesia, caudal block was given in left lateral position. Patients in Group C received 1.0 ml/kg, 0.15% ropivacaine alone and in Group D 1.0 ml/kg, 0.15% ropivicane with 0.2 mg/kg of dexamethasone. Postoperative duration analgesia (FLACC pain score) was assessed. Result: There was no statistically significant difference observed with respect to demographic data, peri-operative heart rate, systolic and diastolic blood pressure and requirement of sevoflurane % concentration in both the groups. After eight, 12 and 24 hours, mean FLACC score was significantly high in children of group C compared to group D (P<0.0001). The mean duration of analgesia was significantly more in group D (946.15+165.42 min ) as compared to group C (420.6+15.35 min) (P<0.0001). No side effects were observed in any of two groups. Conclusion: Caudal administration of dexamethasone to ropivicane significantly increased the duration of post-operative analgesia without any major side effects in children. In paediatric patients by using this simple and safe method, satisfactory analgesia can be provided.