The purpose of the present study was to analyse the relation of body mass index with the performance of Taekwondo players. The subjects selected for this study were national taekwondo players. The data for this study was collected during senior national taekwondo championship 2018. The data for body mass index was caluculated by using the weight and height data of the players. The data collected then was analysed using Pearson product moment correlation coefficient at 0.05 level of significance. The results of the study showed significantnegative relationship between body mass index and the performances of taekwondo players.