The purpose of this study was to investigate the relationship between attachment styles and positive/negative perfectionism, anger, and emotional adjustment of students. The research was a correlationl study. The population consisted of all graduate students of University of Ardabil in 2013. From among them, 234 students were sampled using random sampling. The research tools consisted of Hazan and Shaver Adult Attachment Scale (1987), Terry-short, et. al. Positive and Negative Perfectionism Scale (1995), Rezakhani Anger Control questionnaire (2010) and Raynolds Emotional Adjustment questionnaire (2001). The data were analyzed through Pearson’s correlation coefficients and multiple linear regression. The results of multiple linear regression indicated that insecure attachment styles (avoidant, ambivalent) could only predict negative perfectionism and ambivalent attachment style could predict anger (P<0.05). On the other hand, secure attachment styles (avoidant and ambivalent) could predict emotional adjustment (P<0.05). Attachment patterns can determine many behaviors, emotions and adults’ relations. They are necessary for personality growth and are the base for mental health. The results of this study emphasize the importance of interaction in childhood, its effect on the growth and mental health in adulthood, and can be the background for counseling.