The chapter examines the relevance of (international) human rights law for international arbitration. It advances the proposition that (international) human rights law is part of the fabric of international arbitration. Hence the chapter sets out firstly thehuman rights norms and human rights methodology as far it is relevant in the international arbitration context. It then discusses human rights as the means to justify the existence of international arbitration. In its main part, the chapter considers the relevant human rights norms in commercial and investment arbitration and discusses the application of international human rights law in the commercial and investment arbitration context.