Trust means that one party has trust and is willing to rely on the partner. Customer trust is a belief in the supplier's honesty, goodwill and abilities. Trust can reduce uncertainty. By reducing uncertainty associated with existing suppliers, it inversely increases uncertainty from alternatives, and in turn changes costs based on the perception of uncertainty. Cooperation with suppliers is currently the basic strategy for reducing procurement costs. Buyer's trust in the supplier reduces the perception of risk associated with the supplier's opportunistic behavior and the transaction cost in trade type relationship. New challenges for competitive advantage require the positioning of active cooperation between companies and their suppliers, who should be considered their collaborators and partners instead of their competitors and enemies. Cooperative management enables the company to improve the quality of its products and its image, speed up delivery to its customers and make its production and sales more agile, in turn the customer's perception of the product improves. When ethics are improved in business, trust, improved communication and creation of long-term value-added relationships will result in greater competitive advantage and creation of shared profits. The inclusion of companies in a more global system, the establishment of intensive cooperative relations represents a deep and radical change in mentality and can even be a source of competitive advantage. This new mentality leads to a significant increase in the quality and quantity of the flow of information between organizations and their stakeholders, which is essential for achieving an open and reliable relationship. With the aim of understanding the importance of trust in the supply chain in general and in the cosmetics industry, the thesis studies the impact of trust on the operations of the supply chain within the wholesale company Let's Face It Nordic, that is part of the cosmetics industry. The theoretical part of the paper elaborates on trust as a phenomenon in general and in business, studies aspects and models of supply chain management and the influence of trust in business. The empirical part of thesis is based on research using the in-depth interview method with a key account manager, in order to study the significance of the influence of trust on the implementation of organizational changes. Very often, aversion to changes is created due to the complexity of their implementation, but it is important to understand that they are almost always the driving force in creating positive results.