The aim of this research is to determine B cluster of prevalence of personality disorders among high school female students. Statistical Population consists of all female students from first to third grade of high school in five regions in Isfahan. Sample size was 1400 students chosen randomly among 75 schools. Millon multiaxial clinical questionnaire was used as the instrument for data collection. In the final analysis the prevalence rate of antisocial personality disorder signs 0.08%,

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... ic 1.9%, histrionic 6.4% , and borderline 0.08% were specified. These findings belonged to students whose grades were 85 and above and have serious personality disorder signs. But students whose grades were between 74- 85, Providing they had suitable conditions, they were more likely to suffer from personality disorder. The rate of personality disorder prevalence among this group appeared to be as follows: antisocial 1.15% , narcisstic 1.3%, histrionic 14.7% , and borderline 1.9%