In the conditions of the development of market relations in Ukraine, the protection of commercial information is becoming an increasingly urgent issue. Growing competition, technological progress and the globalization of markets encourage business entities to implement various measures to ensure the privacy of their data. One of the most effective tools for this is a commercial nondisclosure agreement, which is designed to protect sensitive information from unauthorized use and/ or disclosure. In connection with the constant changes in the economic and legal environment, there is a need for research in the field of commercial nondisclosure agreements. The development of new approaches to the conclusion and enforcement of non-disclosure agreements will allow taking into account changes in the economic environment and technological innovations, which in turn will strengthen the legal framework for business protection. The article examines the legal nature of an agreement on non-disclosure of commercial information, in particular in the context of labor relations, where one of the parties is an employee, and also provides a definition of such an agreement. The author notes that an essential condition of this contract is a clear definition of the information subject to protection. The definition of trade secret covers financial, technical, legal, corporate information and other information of commercial value. The author offers a list of information that can be classified as a commercial secret, and emphasizes the importance of adapting this list to the specifics of legal relations. In particular, in contracts concluded between an employer and an employee, it is necessary to provide for information protection conditions, and also an important aspect is the regulation of the term of the contract, which can extend both to the period of the employment relationship and after its termination. The author emphasizes that the regulation of relations regarding the non-disclosure of commercial information can be implemented within the framework of a mixed contract containing elements of various contracts, which opens up new opportunities for the legal protection of commercial secrets in various spheres of activity. The legal analysis of the specified contract provides an opportunity to consider in detail the structure, essential conditions and features that can significantly affect the effectiveness of its application.