During the last two decades, many researchers have investigated the relationship between perfectionism and academic performance, and different results have been obtained. Therefore, it is felt necessary to use meta-analysis studies to provide general results. The method used in this research is meta-analysis. The statistical population of the research included available published studies. In order to collect information, a researcher-made checklist was used. After checking the inclusion and exclusion criteria, 40 effect sizes were found out of 24 studies. It was obtained with the conditions of meta-analysis. In order to analyze and analyze the data, sensitivity analysis, funnel plot, fixed and random models and heterogeneity analysis were used from CMA software. The fixed effects model is 0.067 and for the random effects model it is 0.083, which was evaluated as low according to Cohen's index. Also, the relationships between the components of perfectionism (adaptive, incompatible, self-oriented, socially oriented, perfectionism in general) and academic performance are also based on criteria. Cohen interpreted high, high, medium, low, and low values. Due to the heterogeneity of the effect sizes, the gender and type of sample used in the researches were examined as moderating variables. The results showed that the effect size of the relationship between perfectionism and academic performance in the researches where male subjects were used for the research, compared to Other researches are more. Also, the effect size of the relationship between these two variables in the researches that used students as samples is more than other researches.