The purpose of this study was to investigate the effects of individual factors (gender, academic achievement, self-concept, sleeping time, presence or absence of someone who shares worries, life satisfaction, and judgment about one’s health), family factors (father’s education level.
mother’s education level, and economic status), and school factors(perception of school life and satisfaction of school life) on the adolescents’happiness. Descriptive statistics, correlation, hierarchical regression analysis were used. Hierarchical regression were put into the model, individual, family, and school factors. This study used the National Youth Policy Institute’s ‘A study on the human rights of children and adolescents’ in 2019 (middle, and high school). The number of middle school participants was 2,054, and the number of high school participants was 2,706. The results obtained from the analyses were as follows. First, academic achievement, self-concept, life satisfaction, judgement about one’s health, and school satisfaction were statistically significant in both middle and high school. Second, for middle school students the father’s education level and perception of school life were significant. For high school, sleeping time, and the presence or absence of someone who shares worries were additionally significant.
Third, according to the results of hierarchical regression analysis, adolescents’ happiness was mostly explained by individual characteristics. School factors resulted in more happiness than family factors. Finally, the significance and limitations of the results of this study were discussed.