Introduction: Stunting is the biggest nutritional problem for children under 5 years old in Indonesia. Stunting prevalence in Malang Regency was 27,1% at 2020. The aim of this study is to determine the stunting factor in children under 5 years old in Gondanglegi as the regency that has higest prevalence of stunted children. The aim of this study were to determine factors that affecting stunting in Gondanglegi sub-district, Malang regency, Indonesia. Materials and Methods: A case control study was conducted with total sample of 136 children aged 6 – 59 months divided into two equal groups. It was conducted in Gondanglegi and Ketawang Community Health Center located in Gondanglegi Sub-district, Indonesia. Data collected included height and weight measurement, questionnaire based interview and 24-hour food recall. Chi square and t-test were used to investigate the difference between two groups and logistic regression was used to multivariate analysis. Results: Multivariate analysis showed that protein intake (OR = 35,308), calorie intake (OR = 9,563) and exposure to infection (OR = 5,168) are associated with stunting on children under 5 years old in Gondanglegi Sub-district, Indonesia. Discussion: Protein and calorie intake and exposure to infection play major rule to stunting. Infection such as diarrhea and ARI can make kids lost appetite, fluid and electrolytes. Insufficient protein and calorie intakes while children undergoing infection may take them at risk of stunting greatly. Conclusion: Children who did not get sufficient intakes of protein and calories ang exposed to infection are likely at risk of stunting.