Purpose: of this research was to compare the effects of internal/external and related/unrelated on Quiet eye changes and accuracy free throw of skilled male basketball players. Methodology: The statistical population of this research was all-male skilled basketball players of Esfahan city in 2017. Using purposeful sampling, 20 skilled basketball players (24/55±2/25 years) who were eligible to enter the research (using the Basketball Premier League players according to the test of the level of mastery of free throwing basketball) were selected. In order to measure the accuracy of basketball throwing, an eight-value scale was used. To measure the Quiet eye changes Eye-tracking was used. In order to analyze data using SPSS software using paired t-test and analysis of variance with repeated measures were used. Results: showed the impact of each of the strategies on the accuracy of free throws and Quiet eye changes in skilled basketball players. Also, unrelated external focus strategy compared with other strategies, further enhancing the accuracy of the basketball free throw and further increased the length of the Quiet eye of skilled basketball players Conclusion: It is recommended that coaches use an irrelevant external strategy to improve the performance and behavior of skilled athletes.