Adolescence is a transitional phase of growth and development between childhood and adulthood. The unique nature and importance of adolescents mandates explicit and specific attention in mental Health. The aim of the study is to assess the level of social anxiety among the adolescent in selected schools of Sagar, M.P. The objectives of the study are to demonstrate the Jacobson’s Progressive Muscle Relaxation Technique (PMRT) to the adolescents, to compare the Post-test social anxiety scores in both the groups and to find out the association between the social anxieties Post-test scores with the demographic variables of both groups. A true experimental research design was used with the experimental and control group, with 60 samples in the experimental group and 60 in control group. Total of 120 adolescents were found to have social anxiety, which was categorized as Mild, Moderate and Severe on the basis of anxiety scores on the 1st day. Jacobson’s Progressive Muscle Relaxation Technique was administered for 10 days, once a day and social anxiety was assessed on the 11th day. Based on the findings the conclusion was drawn that Jacobson’s Progressive Muscle Relaxation Technique is effective in reducing social anxiety among adolescent.