According to J. Jessen, A. Hesse, A. Weber, the market represents the confrontation of supply and demand. From this, it can be deduced that the market is the place where the buyer and the seller act on the exchange of their goods by supply and demand. However, that definition corresponded to the time when the market was not complex or uncertain, ie. when it was based on the sale of goods at a particular place.Development of the society led to market development, which resulted in the emergence of different complex market definitions.. Until the 1930’s of 20th century, economists divided the market into three market types, which were perfect competition, monopoly and state intervention. Today there are four market structures: perfect competition, monopolistic competition, monopoly and oligopoly. In a perfect and monopolistic competition, there are more companies that make the market a big "chess" for companies, but the oligopoly and monopoly are the ones that affect the most customers' wishes and needs and are changing the whole market. Furthermore, according to additional research and data found by different authors, there are other types of competition, which are considered more prominent, listed and explained. In this work theoretical concepts of the market structure are explained and other types of competition are illustrated with examples from practice. Though the theory is very extensive, there is still some space left for further research.