Dysmenorrhea is a condition of cramps or pain during menstruation. Dysmenorrhea that usually occurs in young women is primary dysmenorrhea. The incidence of primary dysmenorrhea is very high, caused by various risk factors, one of which is nutritional status. An abnormal Body Mass Index can cause pain during menstruation. This study aimed to determine the relationship between nutritional status and the incidence of primary dysmenorrhea based on the WaLIDD score at the Medical Faculty of the Indonesian Christian University (UKI). This research is an analytical study with a cross-sectional approach conducted in November 2020. Data were collected on nutritional status using a height and weight questionnaire and dysmenorrhea data using the WaLIDD score questionnaire. The sampling technique in this study used purposive sampling, with a total sample of 429 female students. The results of the Chi-Square Statistical Test obtained a p-value of 0.047 (p <0.05), which can be concluded that there is a relationship between nutritional status and the incidence of primary dysmenorrhea based on the WaLIDD score at the Medical Faculty of UKI.