José Martín y Pérez de Nanclares (Vitoria, 1965) is a Spanish jurist. Currently, he is a judge of the General Court of the European Union, one of the two constituent courts of the Luxembourg Court, as well as a professor of Public International Law and International Relations at the University of Salamanca. He is also an associate member of the . From 2012 to 2018 he was head of the International Legal Office of the Spanish Ministry of Foreign Affairs, in charge of advising the General State Administration in all matters of international law. After briefly returning to teaching, he became director of the cabinet of the President of the Spanish Council of State, before his appointment for European judiciary. He was also a member of the Permanent Court of Arbitration (2018-2019).