Background: Aggression among juvenile delinquents is higher than other children, hence they move more towards crime. Aggression is an important factor in increasing juvenile delinquency.

Aim: To Study the effect of Pragya Yoga and Pranakarshan Pranayama (PYPP) on aggression tendency level of juvenile delinquents.

Methodology: This study was done on juvenile delinquents of Chhattisgarh, India in 2009 and awarded PHD from DSVV Haridwar. For this study Permission was obtained from superintendent of Juvenile care home, Mana Durg, Chhattisgarh. A total hundred (N=100) participants were selected by Experimental control group design. 14 to 18 years juvenile delinquents were selected for this study. All participants were devided in two groups. An experimental group (N=50) and a control group (N=50). The groups were divided in such a way that there was no statically significance difference in baseline mean between both the groups. The practice of Pragya Yoga and Pranakarshan Pranayama (PYPP) was done regularly for 45 days by the experimental group. In this study to measure aggression level the aggression scale constructed by Ku. Roma Pal and Dr. Tasneem Naqvi (1983) have been used. Received data was analysed by T-test. According to statistical analysis, obtained result is significant at 0.01 level, which makes it clear that practice of Pragyayoga and Pranakarshan Pranayama leads to significant decrease in the Aggression Scale of juvenile delinquents.