Purpose: The purpose of this study is to recognize menstrual pattern and dysmenorrhea related factor of first-year women student at college. Methods: From March 22nd to April 2nd, 2010 we researched 382 first-year women students at 00college, aged 19(born after March 1991 to February 1992) by questionnaires to investigate their menstruation and stress. Results: 1. There was statistical correlation between dysmenorrhea and weight and BMI. 2. There was statistical correlation between dysmenorrhea and menstrual amount. 3. There was statistical correlation between dysmenorrhea and menstrual blood clot. 4. There was statistical correlation between dysmenorrhea and stress. Conclusion: This study showed the menstrual pattern and relation between dysmenorrhea and stress. Dysmenorrhea is related to weight, BMI, menstrual amount, menstrual blood clot and especially stress is closely related to dysmenorrhea.