Organizations believe that cyberloafing should be managed on the grounds that it reduces performance and leads to inefficient working order. The cyberloafing means non-business use of Internet access and IT equipment by employees during their working hours. One hand Internet which is one of the most important invention of our era creates important opportunities for businesses, institutions and organizations to increase their efficiencies, on the other hand it brings some risks and disadvantages for these units. One of these disadvantages is cyberloafing which means usage of internet in working hours for nonwork purposes. Meanwhile, the aim of the study is to determine the effect of cyberloafing on employee performance. In this context, the sample of the study is 209 in total and consists of 101 Polish and 108 Turkish academics. In this study, the prevalence and perceived seriousness of cyberloafing among Turkish and Polish academics were compared. Furthermore, the differences between the policies and regulations of internet use among the two countries were examined in the context of cyberloafing. When the results were evaluated, there was no relations between cyberloafing and employee performance for the two countries, but differences were found in the other variables examined. Thus, sufficient and weak sides of two countries has been tried to determine.