Abstract: Objective To examine the attitude to chastity and its influencing factors among the unmarried female postgraduate students.Methods Subjects were 3 598 postgraduate students recruited from eastern,central,and western parts of China.We used chi-square test in data analyses.Results The results showed that only a small number(15.3%) of the students was careless about chastity and more than one third(36.7%) of the students cared about chastity;nearly a half of the students(48%) held an attitude of concrete analysis on concrete problem.The most(74.6%) of the students held an attitude of understanding and indulgence toward sex before marriage;but only a small number(18.1%) of the students would accept the sex before marriage.The students' chastity attitude differed significantly by the student's hometown,major,grade and number of romances(all P<0.05).The attitude toward sex before marriage was significantly different among the students of different grade and number of romances(P=0.000 for all).Conclusion The unmarried female postgraduate students' chastity consciousness is flagging,but most people hold a rational attitude towards it.The unmarried female postgraduate students' attitude to chastity is influenced by many factors.