The main purpose of this study was to examine the correlation among socio-economic factors, T.V. watching and attitudes of teenagers in Bangkok. The sample used in this study were 200 7th, 8th and 9th grade students of two schools: 100 students of Chulalongkorn University Demonstration School and 100 students of Chanhoonbampen School. Questionnaires were used to collect the data. Frequency, percentage, Pearson's product moment correlation coefficient, partial correlation coefficient and stepwise multiple regression were employed for the analysis of data. SPSS progress was used for data processing. The major findings of the study were as follows: 1. Every teenager was the T.V. watcher. The top 5 programs attracted most teenagers were news, movies, game shows, musical programs and sports respectively. Most teenagers (161 or 80.5%) watched television with other members of the family.2. There was no significant correlation between sex, school, socio-economic status of the family, parents' relationship and theamount of T.V. watching, the frequency of "news-knowledge" watching. However, there was a significantly poditive correlation between sex, school, socio-economic status of the family, parents' relationship, and the frequency of 'entertainment" watching. 3. There was no significant correlation between the amount of T.V. watching, the frequency of "news-knowledge" watching and taste, aggression, morality. There were, however, a significantly positive correlation between the frequency of 'entertainment" watching and taste, aggression, and a significantly negative correlation between the frequency of 'entertainment" watching and morality. 4. Sex did not significantly correalate with taste but negatively correlated with aggression. There was a significantly positive correlation between school, socio-economic status of the family, parents' relationship and taste, aggression. There was, however, no significant correlation between four socio-economic variables and morality. 5. When T.V. watching was controlled, therewas no significant correlation between sex and taste but there still was a significantly negative correlation between sex and aggression. Meanwhile, there still was a significantly positive correlation between school, socio-economic status of the family, parents' relationship and taste, aggression. However, there was no significant correlation between four socio-economic variables and morality. 6. Priorities of variables able to explain taste were as follows: 1) School or socio-economic status of the family. 2) The frequency of 'news-knowledge" watching. 3) The frequency of "entertainment" watching' Priorities of variables able to explain aggression were as follows: 1) School or socio-economic status of the family. 2) The amount of T.V. watching. 3) The frequency of "entertainment" watching. 4) Sex. None of the variables was able to explain morality.