The main topic of this paper is a description of the trade functions. In the practical part of the paper is used the company Müller to show the theoretical part of this paper on the example. Through the paper, it is primary intention to give a basic definition of the concept of trade and its development through history, its function and division. The tasks and meaning of trade, marketing and trade business processes and business units are explained further, and as a theoretical part of the work is the Trade Act as the most important law for this area of this research. The basic information about Müller's trade is also presented in order to understand the background of the business, and then discussing the functions of the trade. In trade division, work was based on retail and the way retail trade operates. There are ways of organization and the most important features of the market and trade and are all shown in the example of the Müller store. It is important to note that the work is mostly based on the primary functions that are then linked to the secondary functions of the store. At the very beginning, it is necessary to state the first and most important function of trade - the intermediary function between producers and consumers. Trademarks are still dating from the original human community. It was a basic skill through which people exchanged services and goods, initially for goods obtained from nature (for example, thanks to hunting or agriculture), and later to produce goods. The development of science has created the conditions for applying new methods and management techniques