Introduction: Prevention of obesity needs to be done early because obesity can become obese as adult. The purpose of this study is to determine the relationship among sex, age, breakfast habits, the consumption habits fast food, habit of eating snack, knowledge, exercise and nutritional status of the students of Junior High School (SMP) Mardi Yuana in Rangkasbitung. This descriptive quantitative study utilized cross-sectional design with 76 (seventy-six) respondents. The result of the bivariate analysis using t-test shows a significant relationship between age ( P = 0.039) and nutritional status. The multivariate analysis using multiple linear regression test shows that breakfast is highly correlated to the nutritional status.