This paper explores how the arbitrators are chosen and the role they have in international arbitration, focusing on how their selection, qualifications, and ethical obligations affect the fairness and legitimacy of the arbitration procedure. Because arbitration is dependent on party autonomy and neutrality, the choice of arbitrator really important because based on who you choose it will affect the decision. The study explores the main methods of appointing arbitrators—such as party agreement, institutional appointment, and appointments made by courts or what happens when disputing parties fail to choose an arbitrator. It also analyzes the most important qualities of the arbitrators that affect the process and they must possess, including independence, impartiality, expertise, and professional integrity. Furthermore, the paper discusses the procedures for challenging, removing, or replacing arbitrators, with reference to the rules of the ICC, LCIA, and UNCITRAL. The ethical part of arbitrators’ work, particularly issues of neutrality, conflicts of interest, diligence, and confidentiality, is examined in light of internationally accepted standards. Through a comparative review of leading institutional rules and relevant academic literature, the paper highlights the central role arbitrators play in ensuring due process and maintaining confidence in international arbitration.