This article deals with the arbitrator’s impartiality from an intersectional perspective, seeking support from procedural law, economics and psychology. Impartiality can be analysed in its various aspects (aesthetic, multidirectional subjective, objective, evaluative-evidence and normative). The topic has been the subject of intense debate in academic and judicial circles and, through this study, we intend to contribute to the debate by demonstrating that the arbitrator must possess a continuous and permanent commitment to preserve and cultivate impartiality.