Introduction: Inguinal hernia repair, the commonly performed surgery in pediatric patient, is associated with significant postoperative pain. Transversus abdominis plane (TAP) block is the newly used regional technique for providing analgesia after abdominal surgeries. Use of ultrasound in regional anaesthesia has improved the safety and reliability of the TAP block and caudal block. There is limited literature comparing the effect of USG guided Transversus abdominis plane block and USG guided caudal block for post-operative analgesia. The aim of our study is to compare post-operative analgesia in USG guided Transversus abdominis plane block versus USG guided caudal block in unilateral open herniotomy in paediatric age group