In recent years, the phenomenon of cyberloafing has gained an important position in the field of organizational behavior studies. The main objective of the present study was to identify the antecedents and consequences of cyberloafing and to determine the effect size of each in Iranian government organizations. The research has been developed using the meta-analysis method and a quantitative synthesis approach of the results of research conducted in this field. The population studied in this study is quantitative researchs based on correlation, regression, and structural equations, including articles published in scientific and research journals and master's and doctoral theses at national universities from 2009 to 2024, which have addressed antecedents (causes) as independent variables and consequences (outcomes) as dependent variables on the issue of cyberloafing in Iranian government organizations. Accordingly, 41 selected studies, 59 independent variables, and 23 dependent variables were identified and included in the final analysis. Various studies were analyzed using comprehensive meta-analysis software (CAM 2). The results of the data analysis showed that among the antecedents of cyberloafing, the variables of subjective norms (0/720), social attrition (0/717), job satisfaction (-0/688), job embeddedness (0/634), perceived behavioral control (0/630), organizational rejection (0/627), employees' perception of creativity and innovation (-0/577), employees' perception of conflict tolerance (-0/533), employees' attitudes (0/530), and abusive supervision (0/519) have the largest effect sizes, or in other words, the most important role in predicting the phenomenon of cyberloafing. Also, the largest effect sizes on the consequences of cyberloafing were related to the organizational procrastination (0/784), organizational obstruction (0/613), virtual turnover (0/486), psychological separation (0/466), innovative behavior (-0/439), financial performance (-0/364), and Internet addiction (0/356), respectively.