The GSI Helmholtz Centre for Heavy Ion Research (German: GSI Helmholtzzentrum für Schwerionenforschung) is a federally and state co-funded heavy ion (Schwerion [de]) research center in Darmstadt, Germany.

The laboratory performs basic and applied research in physics and related natural science disciplines.

As a member of the Helmholtz Association, the current name was given to the facility on 7 October 2008 in order to bring it sharper national and international awareness.

[2] The GSI Helmholtz Centre for Heavy Ion Research has strategic partnerships with the Technische Universität Darmstadt, Goethe University Frankfurt, Johannes Gutenberg University Mainz and the Frankfurt Institute for Advanced Studies.

[16] The creation of FAIR was co-signed on 7 November 2007 by 10 countries: Finland, France, Germany, India, Romania, Russia, Slovenia, Sweden, United Kingdom, and Poland.