The aim of this study were to investigate the effect of unstable attachment on subjective well-being and to identify mediator effects of decentering and self-compassion.

A total of 255 college students participated in this study by completing the following questionnaires: Experience in Close Relationship Scale, Subjective Well-being Questionnaire, Decentering Scale, and Self-Compassion Scale.

Mediated Regression Analysis was used for the purposes of study. The results are as the following. First, unstable attachment had significant negative correlation with subjective well-being and decentering and self-compassion. Second, decentering had a partial meditational effect on the relation between unstable attachment and subjective well-being. Third, self-compassion had completely meditational effect on the relation between unstable attachment and subjective well-being.

These results suggested that it is important to enhance students’ level of decentering and self-compassion in order to increase their subjective well-being effectively.