Back ground: Oral health related quality of life (OHRQOL) reflects people's comfort when eating, sleeping, and engaging in social interaction. Poor oral health affects social activities and child quality of life, such as attending school and inter acting with other people. Aim of this study was to determine the effect of educational program about dental problems on health related quality of life for children. Subjects and Method: A Quasi experimental research design was used at pedodontic clinic, Faculty of Dentistry, Tanta University. A convenient sample of 60 school age children with dental problems. Tools: Three tools were used to collect the required data Structured interview schedule (Tool I): to assess child knowledge and practice regarding to oral health and dental problems. Oral Assessment Scale (OAS) (Tool II): to assess oral health of school age children. Oral health related to quality of life scale (Tool III): to assess the effect of oral health on children quality of life . Results showed that, before program 56% had poor knowledge and practice about oral health and dental problems while after program 66.7% had good knowledge and practice. Regarding child quality of life, nearly two third (65 %) of children had poor quality of life pre- program while as half of them ( 51.6 %) had good quality of life after three months of program implementation. Conclusion: The educational program has a positive effect on improving childrens knowledge, practice and their quality of life. Recommendations: Establish continous educational programs for mothers and their children as well as nurses working in dental clinic to improve their information. School curriculum should be containing information about oral health and dental problems to improve awareness of school age child about it .