In this study, the relationship between the quality of life levels of children aged 9-11 and their perception of family functions and some demographic characteristics was investigated. The sample of the study included six primary schools and six secondary schools in the central districts of a metropolitan city located in the west of Turkey in the 2017-2018 academic year. Participants were 783 children, 396 girls and 387 boys. Multiple regression analysis was used to analyze the data collected by using the General Quality of Life Scale for Children and Family Relationship Scale for Children. The results of the analysis showed that supportive and discouraging family relationships scores significantly predicted the quality of life of the children and explained 35.80% of change in their quality of life. In addition, the predictive power of supporting family relationships (28.70%) was significantly higher than that of the discouraging family relationships (-7.10%) in explaining children's quality of life. Gender, age and number of siblings were not significantly correlated with life quality of children.