Social marketing is the systematic application of marketing to achieve changed behavioral goals for a social good among the high risk population. In India the community of truckers is vulnerable to HIV/AIDS due to higher prevalence of risky sexual behaviour, which results from a variety of social and economic factors as well as their work patterns. Reportedly, close to 36% of truckers are clients of sex workers and 25-30% of clients appear to be truckers.Measuring the effectiveness of social marketing the effective factors were measured and reflected among selected mass medias through this book"Effectiveness of social marketing & Behavioural change". This will help the policy makers, implementer working on this field to develop strategies for preventing HIV/AIDS.