Background and Purpose: The concept of attachment is a stable emotional bond between two people, so that each party strives to maintain proximity with the subject of attachment and behave in a way that ensures the continuation of the relation. Spiritual intelligence is one of the concepts that, in light of the global interest of psychologists in the field of religion and spirituality, has been proposed and developed. The Relationship of the attachment styles and spiritual intelligence with religious attitudes of secondary school students were goals of this study. Materials and Methods: Research method was a correlation study and population included 11,650 people from Amol city secondary school students. According to Cochran formula, 370 students were selected through random sampling method. To gather data, Hazen and Shiour attachment style questionnaire, spiritual intelligence Judy Neal (2004) questionnaire and about attitudes to religion, Allport (1950) questionnaire have been utilized. Results: The findings showed that there is relationship between attachment and spiritual intelligence components and the religious attitudes of students (P ˂ 0.1). Regression analysis showed that there is significant relationship between the elements of attachment and spiritual intelligence components with a religious attitudes on 95 percent (0.47 = R, 16.56 = F (6 and 363) (P ˂ 0.5). This study showed that only the proportion of pervasive attachment style and relationship with the transcendent, spiritual intelligence, respectively (3.03 = t, 0.02 = β 2.47 = t, 0.02 = β) in predicting attitudes religious is meaningful. But the other variables are not significant. Conclusion: Based on the results of this study, the attachment style and spiritual intelligence are capable to explain variance for religious attitudes of secondary school students.