The study tested the hypothesized mediating role of social comparison in the relationship between choice-making orientation and subjective well-being. Two hundred twenty eight college students from a private university participated in this study. Results of the regression analyses revealed that choice-making orientation and social comparison significantly predicted subjective well-being. Choice-making orientation also significantly predicted frequency of social comparison. The mediation analyses showed however that social comparison fully mediated the relationship between choice-making orientation and subjective well-being. Results were discussed in relation to current discussions about the significance of traits in predicting behaviors of individuals from a collectivistic cultural context.