Harald von Boehmer (30 November 1942 – 24 June 2018) was a German-Swiss immunologist and author[2][3] best known for his work on T cells.

He was a member of the Basel Institute for Immunology in Switzerland (1973–1996), director of Unité INSERM 373 at the René Descartes University in Paris, France and is Professor of Pathology at Harvard Medical School and the Faculty of Arts and Sciences of Harvard University, Cambridge and Chief of the Laboratory for Lymphocyte Biology at the Dana Farber Cancer Institute in Boston.

Questions concerned with the role of positive and negative selection of developing T cells by peptide-MHC complexes in the thymus in generating an effective and self-tolerant immune system were analyzed in TCR transgenic mice.

Harald von Boehmer was elected as a Senior Member of the Institut Universitaire de France (1997), was awarded the Louis-Jeantet Prize for Medicine jointly with Nicole Le Douarin and Gottfried Schatz in Geneva (1990) and received an honorary Medical Degree from the University of Technology, Munich (2002).

Harald von Boehmer retired at the end of 2012 and was a guest professor at the Institute for Immunology of Ludwig Maximilian University of Munich beginning January 2013.