Context: For the purpose of this study, functional balance in children is defined as the ability to maintain the center of mass with respect to the base of support during typical childhood activities of daily living, school, and play. Aim: To find out reliability and concurrent validity of Fullerton advanced balance scale in school going children. Settings and Design: The observational study was carried out in Shri U.S.B College of physiotherapy, Aburoad. Method and Material: After the ethical approval from committee and written consent from guardian who were willing to participate in study, 52 schools going children were selected based on inclusion and exclusion criteria. Both the boys and girls, with age group 5 to 15 years were taken for the study. The children were assessed using FAB Scale by two rater for inter rater reliability and by same rater at different time (24 hours of duration) for intra rater reliability. The patients were also assessed by PBS to find out concurrent validity of FAB Scale. Stastical analysis: Data was analysed by using SPSS Version 20. Intra and inter rater reliability and concurrent validity of FAB Scale were assessed by Spearman‘s correlation coefficient. Results: Spearman‘s correlation coefficient value for Intra rater reliability is 0.782 , Inter rater reliability is 0.738 and concurrent validity is 0.751 which show moderately positive correlation of Intra rater, Inter rater reliability and concurrent validity of Fullerton Advanced Balance Scale with Pediatrics Balance Scale. Conclusion: The Fullerton Advanced Balance Scale appears to be reliable and valid test to independent school going children affect movement to walk over obstacles, anticipatory control, dynamic gait and reactive postural control in various directions. The FAB Scale is an easy–to–administer, less equipment use and less time consuming clinical test with concurrent validity, intra rater reliability for assessment of functional balance in school going children.