This work presents a theoretical generalisation of a scientific problem, the essence of which is to define the concept of interim measures in international business arbitration, and a comprehensive study of the principles and legal nature of such a part of the arbitration. Without an effective mechanism for enforcing procedural arbitration awards regarding the use of interim measures, the benefits of international business arbitration as an alternative dispute resolution mechanism can be eliminated. Thus, the legal nature of interim measures in international business arbitration were also characterized and classified; it is clarified which theoretical views of foreign scientists and lawyers of Ukraine exist regarding the legal nature, concept and types of interim measures in international business arbitration; the mechanisms of using such interim relief in Ukraine and abroad are explained; the level of effectiveness of the enforcement of arbitrator`s decisions on interim measuresin international business arbitration has been defined; gaps and problems of practical application of the current legislation of Ukraine which regulates this sphere of arbitration law are described.