Introduction: Dysmenorrhoea is the most common gynaecology problems female’s goes through in their life. In Malaysia, the overall prevalence of dysmenorrhoea is 78%. There were studies revealed that there is significant asso- ciation between dysmenorrhoea and quality of life (QoL). Female who is having dysmenorrhoea has a lower quality of life compared to others. However, most female ignore this issue as they feel it is a normal female phenomenon. Nevertheless, health education and interventions should be given to reduce dysmenorrhoea, thus improve QoL. The main aim of this research was to determine the menstrual characteristics, primary dysmenorrhoea, and their associa- tion with selected socio-demographic variables among Chinese undergraduate students. Methods: A cross-sectional study was carried out among 317 participants, aged between 19 to 25 years. Purposive sampling method was uti- lized to recruit the participants. Questionnaire on menstruationwas distributed to collect the information regarding socio-demographic background, menstrual characteristics, and primary dysmenorrhoea. Results: The incidences of primary dysmenorrhoea were reported by 63.4% (n=201)in this study. Only a few socio-demographic variableswere detected to have a significant association with menstrual characteristics and primary dysmenorrhoea. Associations between age and menstrual duration was discovered (p=0.005). Besides, menarche was associated with presence of blood clot during menstruation (P