Background and Objectives: Insecurely attachment style is one of effective factors in many mental disorders. The aim of present research was to predict the hopelessness; impulsivity and dissociative and paranoid symptoms in securely; ambivalent and avoidant attachment students. Materials and Methods: The type of the study was descriptive. Subjects of this study were 400 students (200 male and 200 female) from University of Tabriz who were chosen by multistage cluster random sampling. Borderline personality scale (Schizotypal Trait questionnaire-B form) and adult attachment inventory were used for data gathering. Results: There were significant differences in hopelessness; dissociative symptoms, impulsivity and total score of STB between securely attached people and people with avoidant insecurely attachment (p<0.05) and between securely attached people and ambivalent attached people in impulsivity and total score of STB (p<0.05); but no significant differences was found between two above groups in hopelessness and dissociative symptoms (p>0.05), while there wasn't any differences between avoidant and ambivalent attached people in hopelessness; dissociative symptoms, impulsivity and total score of STB (p>0.05). Conclusions: In comparison with securely attached people, people with insecurely avoidant attachment experience more hopelessness; dissociative symptoms and impulsivity; and people with insecurely ambivalent attachment experience more impulsivity. Altogether, insecurely attached people are more prone to borderline personality disorder.