Werner Sandhas (born 14 April 1934, † 25 August 2021 in Bonn) was a German physicist at the University of Bonn.

Born in Berlin-Charlottenburg, he studied physics at the Free University, Berlin, gaining a Diploma in 1960 and becoming a Doctor of Science in 1963. After 2 years as a science collaborator at the Free University he was appointed assistant professor. He then moved to be assistant professor at the University of Bonn (1964-1968) and lecturer at Bonn (1968-1969) before moving to be Professor of Physics at the University of Mainz (1969-1973) and finally moving back as to be Professor of Physics and Co-director of the Physics Institute at Bonn since 1973.^{[citation needed]}

He was awarded the status of Fellow^[1] in the American Physical Society,^[2] after he was nominated by their Topical Group on Few-Body Systems in 1990,^[3] for development of fundamental theoretical methods for the exact treatment of few-nucleon problems, including the development of methods for 3-, 4-, and n-particle scattering theory and methods for the inclusion of coulomb effects in the 3-particle problem.