Abstract:Problem: executive functions refer to the subject's ability to engage in goal-oriented behavior, performing voluntary, independent, self-organized and goal-directed actions, indeed, the general physical training, and the sports can enhance this functions, studys to determinate the effect of martial arts upon the executive functions in childrens are rare. Objective: to identify if the Karatekas has best executive functions that non karatekas. Methods: 66 volunteers were selected, including 36 male karatekas and a comparison group consisting of 30 non Karateka and non regular physical activity, with a mean of age of 11.26 + 0.95 years. The reaction time test and Stroop Test were used. The analysis of variance ANOVA TREE WAY with Dunnett's Post Test set up at 5% was used. Results: in reaction time for all ages, the Karatekas performed better; however, for selective attention and problem solving, 11-year-old karate children did not perform better, while for the other ages, the karate students were faster. Conclusions: Karate is an efficient tool for improving the executive functions of children from 8 to 11 years of age.