The paper presents issues of legal personality of the EU and attempts to answer a question whether and to what extent the EU exercises its legal and international personality. The authoress begins her considerations with the issue of personality understood as the right to be an entity of rights and obligations and their ability to evoke legal consequences in international law through their actions. Considerations on legal personality of the EU include an analysis of the way of regulating this issue in the Treaty of the European Union and also a review of doctrines. However, the basis for drawing conclusions on legal personality of the EU is the review of practice in three fields of actions consistent with attributes of legal and international personality: the right of legislation and immunity, the right of concluding agreements and the right of being a party in a dispute. The last part of the paper is devoted to changes concerning legal personality of the EU which were proposed for the European Constitution and contains a short description of consequences which these changes may cause in the area of exercising its legal and international personality by the EU.