The research presented in this paper aimed to explore relations between stressful life experiences and attachment in adolescence. The sample included 279 adolescents of both sexes, who were students of first two years at the University of Novi Sad. Attachment styles were assessed by RQ (Relationship Questionnaire, Bartolomew & Horowitz, 1991), and stressful experiences by Risk Scale (Grossman et al., 1990). The average score on the Risk scale indicated that participants had relatively small number of stressful events; but majority had at least two stressful experiences. The most frequent event was loss of family member (61,2% of participants) and traffic accident (40,6% of participants). Participants with secure and insecure attachment styles had similar number of stressful experiences in their lives. Difference between these groups was significant only in the case stressors that origin from the characteristics of the family and intrafamilial relations, which was more frequent experience in participants with insecure attachment styles. However, the results showed that stressful experiences may have negative influence on security of attachment, i.e. on positivity of model of self. The highest and statistically significant contribution was made by separation from family and by family characteristics. The results are discussed in context of attachment theory and previous research data on effects of stressful and traumatic events on security of attachment.