This research aims to study about media exposure knowledge attitude and volunteer spirit behavior of the teenagers in Bangkok. Comparison of the demographic characteristics with volunteer spirit behavior and the relations between media exposure knowledge attitude with volunteer spirit behavior of the teenagers in Bangkok. The results of the study were as followed: 1. The Teenagers in Bangkok who are different in demographic characteristics (gender age education level years subjects of study university income residential and family characteristics) has a different volunteer spirit behavior. 2. Media exposure and volunteer spirit attitudes correlated positively with volunteer spirit behavior in the middle level relations. While knowledge of volunteer spirit correlated negatively with volunteer spirit behavior in the low level relations. Moreover the sample exposured the contents of volunteer spirit on the internet is the most 58.2 percent. The sample has knowledge about the volunteer spirit in the middle level. Good attitude in volunteer spirit activities and the sample had a volunteer spirit behavior in the middle level.