The aim of this paper is to explain the concept and role of the party in the entire administrative procedure. Therefore, this paper will consider the current law of the Republic of Croatia relating to the institute of a party in administrative proceedings. The first part of the paper discusses the administrative procedure itself, the course of the administrative procedure and the differentiation of the concepts of administrative procedure and administrative dispute. Also, the principles of general administrative procedure are stated, with special emphasis on those principles that directly relate to the position and rights of the party in the administrative procedure. The paper focuses on the institute of the party, which analyzes the concept of this type of party, the preconditions for their actions and the possibilities that the parties have during the administrative procedure. In addition to the analysis of the position of the party in the administrative procedure, attention is also focused on the restrictions that the parties have under special regulations and their justification.