Today, it is extremely important that the business of a company is based on the concept of sustainable development. Specialist tour operators are no exception. The paper critically considers three key aspects: specialist tour operators, sustainable development and what is the role of specialist tour operators in the sustainable development of a tourist destination. In order to keep pace with the development of today's world, tour operators try to operate as much as possible according to the above concept. The reason for this is the fact that modern consumers are increasingly paying attention to the ethical behavior of companies and it is important for them to conduct their business in accordance with legal regulations. Likewise, the goal of sustainable development is to meet the social needs of the resources available without affecting the social and the environment. This concept represents a new strategy of development in the business of companies, in the business of specialist tour operators. Tour operators are specialist intermediaries between the tourist destination and the tourists and as such they can create package arrangements based on sustainable development. They are also introducing certain changes and activities into their business that will help them achieve greater sustainability. "Exodus Travels", "Green World Holidays" and "Audley Travel" are just a few examples of specialist tour operators whose operations are based on sustainable development.