Background: Child labor is a dominating phenomenon in Egypt. The aim of this study was to evaluate the effect of occupational health program on preventing hazards among child labor. A quasi - experimental design was used. The study was conducted at the Garment factories at Benha City. Egypt.: A convenient sample of (89) child labor .Two tools I- Interviewing questionnaire to assess socio-demographic characteristics for child labor and family, past history of occupational hazards, child knowledge about safe working environmental, and practices regarding first aid practices regarding occupational health. II- Observational checklist sheet of OHSAS application to evaluate factory environment. Results: showed that the majority of the child labor were had poor knowledge about different types of personal protective equipment . Also, the majority of child labor were had poor practices about first aid measures in case of exposure to different occupational hazards. There were statistically significant difference between before and after occupational health program.The study concluded thatoccupational health program will improve the child labor knowledge and practices regarding safety measures to preventing hazard among child labor . The study recommended that periodic occupational health program for all children at work place to prevent occupational health hazards.