This study aimed to investigate the relationship between spiritual intelligence with students' subjective well-being and its subscales. Spiritual intelligence has a significant influence on the well-being and it has been understood that youth is a sensitive period, which requires specific training to make a brighter future and be exposed to the difficulties. The research method was descriptive– correlational type. For this purpose, 220 students from the University of Mazandaran were selected through the multistage cluster sampling method. Spiritual Intelligence Self-Report Inventory Questionnaire (King, 2008) and Subjective Well-Being questionnaire (Keyes and Magyar-Moe, 2003) have been used to assess variables. Data analysis was performed by SPSS 22 software and regression analysis stepwise. Regression analysis results demonstrated the predictive capability of subjective well-being through spiritual intelligence (p< .01). The component of personal meaning production predicted 22% of changes in subjective well-being, 17% in psychological well-being and18% in social well-being. In addition, by 7% of the variances in emotional well-being can be explained by component of transcendental awareness. Spiritual intelligence could be called as superior intelligence and it paves the way for perfection and well-being. Therefore, it seems that proper training for promotion of spiritual intelligence can be an important step for satisfaction and a positive assessment for self and life.