Reinhard Hans Bütikofer is a German politician who has been serving as a member of the European Parliament since 2009. He is a member of the Alliance 90/The Greens, part of the European Green Party. He was the co-chair of Alliance 90/The Greens (alongside Claudia Roth) from 2002 to 2008 and of the European Green Party (alongside Monica Frassoni) from 2012 to 2019.

Since 2009, Bütikofer has been a Member of the European Parliament (MEP) for the German Green Party. He is a member of the Committee on Industry, Research and Energy (ITRE), and a substitute member of the Committee on Foreign Affairs (AFET) and the Subcommittee on Security and Defense (SEDE). As shadow rapporteur, he has authored reports on the evaluation of the European Endowment for Democracy (2015), on the impact of developments in European defense markets on the security