Clean and Healthy Life Behavior (PHBS) of Elementary School Students Against Environmental-Based Disease Incidence in Kupang City in 2021

School-age is a period of vulnerability to diseases such as diarrhea, intestinal worms, caries, and anemia. This research an analytical observational study with cross-sectional design sample 937 elementary school students spread throughout the city Kupang. The data analysis technique used Chi-square test determine relationship between variables studied significant values help SPSS program. incidence environmental-based disease experienced by diarrhea lowest malaria. personal hygiene variable shows good category, results statistical tests show no diseases. also consumption healthy food using latrines in category. There use clean presence mosquito larvae showed free larvae. waste disposal that highest level respondent's house indicates category not good. Hygiene variables, larvae, have children, while habits environmental Disease-based primary children.