The diploma thesis describes the issue of using social networks of a selected com-pany in marketing communication. The aim of the thesis is to analyze the current situation in the company and to suggest a new solution, the marketing tools, which the company can use in the future. The first part summarizes the issues of marke-ting communication, marketing and communication mix and social networks. The analytical part includes analysis of the internal and external environment, analysis of the competitive position of the company, as well as SWOT analysis. The final proposal then explores the communication channels currently in use and shows new possibilities for using communication channels along with the expected costs