Introduction : The aim of this study was to investigate menstrual pattern according to Mibyeong Index(MBI) and compare Mibyeong symptom score according to severity of menstrual pain. Mibyeong Index was designed to measure inconvenience and resilience of subject's complains including four physical symptoms(fatigue, pain, low sleep quality, indigestion) and mental distress including anxiety, anger, depression. Method : We used the clinical data of Korean medicine Date Center(KDC) for subjects who participated in the study of 'Clinical research for collecting of clinical cases based on the personal type of Mibyeng' conducted in Seoul, from June 26, 2015 to June 26, 2017. A total of 566 fertile women aged 30 to 50 who completed the questionnaires were included in this study. In this study, we used items of Mibyeong Index and the menstrual pattern by self-report questionnaires. The date were analyzed through Kruskal Wallis test, Pearson's chi-square test, and one-way ANOVA using SPSS statistics 19.0. Results : Mibyeong status was significantly associated with severity of menstrual pain(p<0.001), worst day of menstrual pain(p<0.05), and type of menstrual pain(low back pain, nausea, depression, and none (respectively, p<0.05)). In addition, The 7-subtype score (fatigue (p<0.001), pain(p<0.001), low sleep quality(p<0.001), indigestion(p<0.001), anxiety(p<0.05), anger(p<0.05) and depression(p<0.05)) of Mibyeong index and total score of Mibyeong Index (p<0.001) showed significant difference for severity of menstrual pain. Conclusion : This result indicates that a close relationship between Mibyeong status and severity of menstrual pain. Further studies are needed but, we hope that this results will be used as the basic data to improve mibyeong status through health care to alleviate dysmenorrhea.