The purpose of this study was to analyze of longitudinal effects of the factors affecting the life satisfaction of life in adolescence. The transition period from childhood to adolescence focused on rapid physical, mental and social changes and developmental period, from the sixth grade of elementary school to the second grade of middle school. This study investigated the gender differences among adolescents in transition in the longitudinal relationship between life satisfaction and influencing factors. The result of this study are as follows. Firstly, the parental attachment trajectory showed increasing in the number of years between sixth grade of elementary and second grade of middle school but there is not on individual differences. Second, bullying victims show a significant decreasing trend from the sixth grade of elementary school to the second grade of middle school. Third, academic accomplishment showed a significant decrease with increasing grade from sixth grade of elementary to second grade of middle school. Fourth, school adaptation showed a significant decreasing trend from the sixth grade of elementary school to the second grade of middle school as the grade increased. Finally, the effects of parental attachment, bullying, academic achievement, and school adaptation on adolescent in transition of life satisfaction were statistically significant only on the intercept of academic achievement and school adaptation.