The purpose of this study is to test the structural relationship between youth activities, creativity, self-esteem, and cooperative competence, and to verify the dual mediating effect of creativity and self-esteem. For this purpose, a structural equation modeling was applied to the Korean Children and Youth Panel Survey 2018 (KCYPS 2018) data set (9th grade). The results are as follows. Youth activities had a positive effect on cooperative competence. In addition, youth activities had a positive effect on creativity and self-esteem. Creativity did not directly have a significant effect on cooperative competency, but it indirectly had a positive effect on cooperative competence by mediating self-esteem. On the other hand, self-esteem had a direct effect on cooperative competence. In terms of the effect of youth activities on cooperative competence, the mediating effect of creativity was not significant, but the partial mediating effect of self-esteem was. Besides, the effect of youth activities on cooperative competence was further strengthened by the dual mediating effect of creativity and self-esteem. Based on these results, implications and suggestions for developing cooperative competence are presented.