The potential synergistic effects of multiple health compromising behaviours like physical inactivity, sedentary behaviour and unhealthy dietary pattern, tobacco use etc on the risk of chronic conditions and health outcomes is a key issue for public health. In 2010, 65% of deaths worldwide were attributed to non-communicable diseases (NCDs) Many risk factors for NCDs among adults are associated with behaviours learned during childhood and adolescence. This study aimed to find out the physical inactivity and sedentary behaviours pattern and its psycho – social correlates. Cross sectional descriptive study was conducted among 402 adolescent students. Samples were selected by disproportional stratified random sampling method from class IX, X, XI, XII. Equal representation was taken from each class & each gender. Data were collected through pretested, validated and reliable questionnaire which was based on AHWQ, YRBS, and literature review. Result of the study suggested more no of girls i.e 68 % girls students were physically inactive than boys (65.35%). More no of girls ( 43%) than the boys ( 38.6%) used to spend their leisure time by sedentary behavior> 2hours/ day. More no of girls spent time by watching TV, Chatting with friends more than boys.Low self esteem and presence of physically inactive family members commonly related with physical inactivity and sedentary behavior of the students.