Background: Upper Respiratory Infection is a disease that attacks the upper respiratory tract, causes of death and decreases the quality of life of children under five. The incidence of ARI around 3-5 times / child / year. The incidence of ARI in Indonesia is still relatively high and experienced an increase in 2015 of 63.45% and in 2017 Tangerang regency was obtained 48.56%. The reason is the lack of mother's knowledge about ARI, the attitude of parents who underestimate because it is considered harmless, and the absence of ARI prevention measures in infants. Aim: Analyze the description of knowledge, attitudes, and actions of mothers towards the prevention of ARI in infants in Binong village. Research Methods: Quantitative, with cross sectional design. The number of samples is 50 respondents who have toddlers with accidental sampling technique. The research instrument used a questionnaire in the form of Google. Data analysis uses univariate analysis. Results: The study showed that 74% less knowledge, 100% positive attitude, and 84% good action against the prevention of ARI in toddlers owned by mothers aged 26-45 years and high school education-Higher Education. Recommendations: For future researchers, it is advisable to look for factors that influence the incidence of ARI in infants.