The diploma thesis is devoted to the marketing analysis of the use of Internet banking in selected banking companies. The primary goal of the diploma thesis is to perform and evaluate a marketing analysis of the use of Internet banking in a selected Slovak commercial bank. The diploma thesis is divided into four chapters, the first of which presents the theoretical basis of the solved problem, the second chapter discusses the goals of the thesis, the third chapter discusses the methodology and research methods and the fourth chapter summarises the results and presents a discussion. The goal was fulfilled by defining the theoretical basis of the solved problem and conducting a marketing analysis focused on five elements of an extended marketing mix of services – product, price, place, marketing communication (promotion) and people. The main contribution of the diploma thesis is represented by the evaluation of marketing analysis, the main tool of which was a questionnaire survey, while only the product and distribution of the elements of the marketing mix were positively evaluated. Marketing communication and people received a neutral rating. The price was evaluated negatively.