Bilgi, Hande2018-11-282018-11-282016Beykent Üniversitesi Hukuk Fakültesi Dergisi 2/4 (2015), 101-1102149-5068According to the European Union Law, acts of the European Union Institutions can be challenged under some conditions. Locus Standi which gives right to applicants to bring an action to the court is one of the important conditions, especially for natural and legal persons who have to prove its direct and individual concern in order to challenge the acts of the European Union Institutions within the scope of Action for Annulment Procedure under Article 263 of the Treaty on the Functioning of the European Union. Action for Annulment Procedure is important for judicial protection of natural and legal persons, whereas it has some obstacles arising from the lack of definitions of direct concern and individual concern under the Treaty on the Functioning of the European Union. Thus the European Court of Justice has been playing an important role for interpretation of these conditions. In line with this paper, terms and conditions of being an applicant of Action for Annulment Procedure as natural and legal persons will be examined.enAction for AnnulmentLocus Standi for Natural and Legal PersonsNon-Privileged ApplicantsDirect Concern, Individual ConcernArticle