This article aims to answer the question of the admissibility of withdrawal from the United Nations Organization. Since the Charter of the United Nations as a foundation act of the Organization does not contain any specific provisions in this regard, the author decides to refer to the general law of treaties and, based on it, to conduct a relevant analysis. Therefore, availing himself of the provisions of the Vienna Convention on the Law of Treaties, the author aims to demonstrate and characterize possible conditions which under customary international law allow the possibility of a unilateral withdrawal from a treaty. In the first place, the author refers to the intentions of the parties to the Charter of the United Nations at the time of its drafting and then to the nature of the treaty itself. As a result of the analysis, he comes to the conclusion that neither the intentions of the parties, nor the nature of the Charter of the United Nations can provide reasonable grounds for acknowledging the possibility of withdrawal from the UN as compliant with international law.