Abstract : The prevalence of stunting in Indonesia in 2020 is 31.8%, in 2021 the province of Maluku the prevalence of stunting under five is 28.7%, and the prevalence of stunting in Ambon city is 21.8%. The aim of this research is to find out the dominant factors that cause stunting. The research was conducted at stunting intervention locations (Laha Village, Poka Village and Rumah Tiga Village) in Ambon City. The research design is a case control study. The total sample was 212 toddlers aged 24-59 months, consisting of 106 stunting cases and 106 respondents who were not stunted. Sampling was done by systematic random sampling. Data were analyzed using Multiple Logistic Regression with predictive models and the Confounding test by calculating the OR of changes using the Cochran-Mantel-Haenszel formula. The results of the Multiple Logistic Regression / multivariate test show that the factors that cause stunting are the most dominant variable Recurrent infection with diarrhea and/or ISPA after being controlled by the mother's ANC quality variable, Exclusive breastfeeding, and smoking behavior at home, value (OR 3.74).General population 95% of researchers believe that Recurrent infection with diarrhea and/or ISPA Iis a risk factor for stunting events with a range of intervals (1.84 to 7.61).