The intention of the present study was to find out the upshot of six weeks pilates exercises on core strength among school children. Twenty (20) male children aged 14 to 17 years were purposively selected from Christhuraja Higher Secondary School, Tirunelveli, Tamilnadu, India. They selected subjects have been randomly divided into two equal groups namely Pilates Exercises Group (PEG) (N=10) and Control Group (CG) (N=10). Six weeks pilates exercises programme has been formulated to see the effectiveness of given training programme on core strength of school children. The core strength has been tested by ‘Plank Test’ on before the training starts and after completion of six weeks pilates exercises programme. Significant positive changes occurs in core strength has been found by analysing and comparing the pre-test and post-test score through paired sample ‘t’ test and ANCOVA among the school children of PEG and CG. So this study was concluded that six weeks of pilates exercises programme was shown effective in the improvement of core strength among school children. However the control group had not shown any significant positive changes on core strength while because they were not engaged to participated in to any specific training programme apart from their routine works.