The present study examined the mediation effects of subjective well-being and self-control on the link between social connectedness and SNS addiction tendency by analyzing responses from 394 college students using structural equation modeling. Results indicated that the association between social connectedness and self-control was fully mediated by subjective well-being. However, the mediating effect of subjective well-being was not significant in the relationship between social connectedness and SNS addiction tendency. In addition, the mediating effect of self-control was not significant in the relationship between social connectedness and SNS addiction tendency. The association between subjective well-being and SNS addiction tendency was fully mediated by self-control. Finally, the mediating effect of subjective well-being and self-control was not significant in the relationship between social connectedness and SNS addiction tendency. However, the total effect of social connectedness on SNS addiction tendency was significant. The implications of the study and suggestions for future research were discussed.