The Wisconsin Card Sorting Test (WCST) is one of the most common assessments to assess executive dysfunction. The present study aimed meta-analysis the reliability coefficients of WCST scores to find out the Typical Estimate reliability coefficient of WCST scores, and to reveal the various factors that may contribute to the high or low value of the reliability coefficient. The present study community includes all studies in the period between (1993-2021) that used WCST versions, and this research resulted in (4657) studies, including (36) studies that were subjected to meta-analysis for reliability by the Convenience Sampling method. The number of reliability coefficients for all test indices were (206) reliability coefficient from (16) WCST indices. The present study focused on the meta-analysis on (98) reliability coefficient calculated by test-retest reliability method for six indexes from the WCST that which: Total Error, perseverative responses, perseverative errors, non-perseverative response, completed categories, failure to maintain a set; due to the lack number of reliability coefficients calculated by other methods of reliability and the lack number of reliability coefficients of other test indices which may impair the statistical power of the analysis. The results of the present study showed that the test-retest reliability coefficients of the WCST generally ranged between (r=0.3-0.7), and the results of the correlation coefficients between the test-retest reliability coefficients for the scores of the WCST and the independent variables showed that there were no statistically significant differences at a level less than (0.05) that attributed to the independent variables, but it is noted that the sample nature was contributed high range in the test retest reliability coefficients for the indicator scores of failure to maintain a set, and to a moderate range in the test-retest reliability coefficients for indices scores of total error, perseverative responses, perseverative errors, and completed categories . The study concluded that the WCST needs to be used with other tests for research purposes or in the diagnostic process to detect executive dysfunction. The study revealed that the reliability coefficients of the scores of the perseverative response indicator is the most stable in the manner of stability test-retest compared to other indices, and in general the WCST scores should be used to with caution while using the test for diagnostic and research purposes.