This diploma thesis deals with the analysis of cases of misleading advertising over the period of 2014 - 2018. The thesis analyzes the self-regulatory body Council for Advertising and Code of Ethics, which regulates the principles of advertisement practice in Slovakia. The aim of the thesis is to analyze the individual cases according to the Code articles, which were also violated by the communication media used in spreading the advertisement among consumers. The thesis is divided into several parts - theoretical part, aim and methodology of work, summary and final part of work. In the theoretical part, the thesis deals with the knowledge of marketing, advertising and legal regulation of advertising and consumer protection against misleading advertising. The methodology of the work summarizes how we obtained the data necessary for the analysis and subsequent results. The final sections contain summary and conclusion where we summarized the results of the analysis and focused on the recommendations for the advertisement creators in creating and spreading the advertisement.