The aim of this article was to examine current trends in the area of customer's satisfaction of Czech and Slovak bank clients. In accordance with this objective satisfaction as well as factors of this satisfaction and dissatisfaction of bank clients in the Czech Republic and Slovakia have been analyzed in relation to a gender, age structure and level of education of customers. In this article the relation between bank customer's satisfaction and number of banking products being used was also studied. Inorder to achieve the above mentioned objectives our specially designed research on client satisfaction with the services of commercial banks in the Czech Republic and Slovakia has been purposely designed and then conducted in 2012. The results of this research confirmed the overall level of satisfaction of bank customers and the most important factors of satisfaction and dissatisfaction that are mostly the same in both countries.