Purpose: The purpose of this study is to analysis on the Heart Rate Variability(HRV) of some dysmenorrhoea patients. Methods : We studied 30 patients visiting Kyung Hee University East-West Neo Medical Center from 7th Febrary 2007 to 22th Febrary 2007. Women with organic disease were excluded from this study. The severity of dysmenorrhoea were measured by Multidimensional Verbal Rating scale(MVRS), Verbal Rating scale (VRS) and Visual Analog Scale(VAS). And HRV was recorded. Results : According to comparison of Means of HRV values among the groups of None, Mild and Moderate, the points of almost all values were kept by order of Moderate group-Mild group-None group. Among these, the statistically significant things are PR, SDNN, Ln (TP), Ln (VLF), Ln (LF). According to correlation analysis between dysmenorrhoea and HRV, specially, there were many correlations in VRS2. Among these, the statistically significant things are LF norm, HF norm, LF/HF ratio(p<0.05L). Conclusion : The results suggest that HRV is related to dysmenorrhoea. We may analyze that dysmenorrhoea is related to, specially, increased activities of sympathetic nerve. We need more study for settling this.