The topic of this thesis is the overview of legal provisions concerning the Sacrament of Holy Orders in the canon law of the Church. Considering the nature of the overview of the provisions of the Sacrament of the Holy Orders in history and nowadays, the thesis is both descriptive and comparative. The content follows the cannons of the current Code of Cannon Law and it is mostly divided into the paragraphs named after the titles that the Code of Cannon Law contains itself. Each paragraph begins with a description of the provisions of the old church law from the Concordat of 1855, continues with the description of the cannon of the same topic from the 1917 Code of Canon Law and ends with the description of the cannon from the 1983 Code of Canon Law, the current Code of Cannon Law. Given the comparative nature of this work, the cannons from the current Code of Cannon Law are compared to the cannons from the Code of Canons of the Eastern Churches. The thesis is thematically divided into three chapters. The first chapter presents the introduction to the thesis itself and brings out the fundamental defintions and theologically – legal thesis of the Sacrament of the Holy Orders. The topic of the second chapter is the celebration of the Holy Orders with the particular reference to the regulations about when and where the Sacrament takes place. The second chapter also concerns the person who has authority to ordain priests to the Holy Order. The topic of the third chapter is the person who recieves the Sacrament of the Holy Order. That is, the third chapter explains who and under which circumstances is allowed to properly receive the Sacrament. At the end of the third chapter, there is a list of documents which have to be enclosed before recieving the Sacrament and the need for the enrollment and testimony of completed ordination. The last mentioned topic is the ending and the conclusion of the thesis itself.