The aim of this research is to study the level of physical fitness of football players between 9-11 years old. Age, height, weight, Body Mass Index (BMI), vertical jump, anaerobic power, maximal oxygen uptake (VO2max ), flexibility, 30 m sprint, the percentage of fat mass (% Fat), body fat mass (BFM), fat-free body mass (FFM) parameters are measured of football players. One-Way Anova test and Tukey HSD test are applied through a package programme called SPSS for statistical analyzes. The results of comparison between the groups, no significant difference are found in terms of % Fat and flexibility parameters. Significant differences on the level of p<0,01 are found in terms of height, weight, vertical jump, 30 m sprint, fat-free body mass (FFM) and VO2max parameters, whereas significant differences on the level of p<0,05 are found in term of BMI, anaerobic power, BFM parameters. As a result, physical, physiological and anthropometric characteristics more improve between 10-11 years old football players than between 9-10 years old.