The aim of the thesis is to prove from the theoretical point of view the importance of crisis communication as a tool of marketing communication, particularly in connection with the public relations. Internal and external communications are covered under corporate communications. Marketing communication is divided into individual subsystems, such as advertising, sales support, personal sales and public relations. The issue of work with the public is dealt with in more detail. The thesis describes the objectives, tasks, main means, strategies, target groups and methods of public relations.