Introduction: in 2008, Indonesia ranks third in the number of smokers in the world after China and India. This fact confirms that smoking is a devastating act effecting on health and economic sectors. There are several factors that encourage a person to smoke. According to Green, there are three factors that shape a person’s behavior. Those are the predisposing, enabling and reinforcing. Objective: This study aims to determine the factors that influence adolescent smoking behavior in RW 04 Sub Pamulang West South Tangerang city. Methods: This research uses qualitative methods. Research is hold in RW 04 Sub West Pamulang, South Tangerang city. Data retrieval is conducted in December 2011 through the observation and Focus Group Discussion (FGD) involves adolescents, a cadre of local integrated healthcare and administrators. Results: There are three factors that influence smoking behavior in adolescents. Being evaluated from the predisposing factors, teenagers consider that smoking is usually done at the time they gather in the youth activities. In terms of knowledge, the adolescent has already known about the dangers of smoking. Meanwhile, the number of stalls that sell cigarettes in the region considered as enabling factors that support the smoking behavior in adolescents. Other factors such as the lack of regulation on the restriction of smoking behavior and the lack of education of health professionals about the impact of smoking are considered as a factor of the reinforcing. Conclusion: There are several factors behind teenagers smoking behavior in RW 04 West Pamulang. These factors are the values that developed in the community, the number of stalls selling cigarettes, the absence of government regulation and the less supportive behavior of health workers towards the issue of teenagers smoking behavior