Max Jammer (Hebrew: מקס ימר; born Moshe Jammer, German: [ˈjamɐ]; 13 April 1915 – 18 December 2010), was an Israeli physicist and philosopher of physics. He was Rector and Acting President at Bar-Ilan University from 1967 to 1977.

Jammer was born in Berlin, Germany. He studied physics, philosophy and history of science at the University of Vienna before immigrating to Mandatory Palestine in 1935, where he completed his studies at the Hebrew University of Jerusalem. He received a PhD in experimental physics in 1942. He then enlisted in the British Army and served for the remainder of World War II.

Jammer then returned to Hebrew University, where he lectured on the history and philosophy of science, before moving in 1952 to Harvard University. He subsequently became a lecturer there and a close colleague of Albert Einstein at Princeton University. He taught at Harvard, the University of Oklahoma, and Boston University, before in 1956 establishing the Department and becoming Professor of Physics at Bar-Ilan University in Israel.

He was Rector and Acting President (succeeding Joseph H. Lookstein, and succeeded by Emanuel Rackman) at Bar-Ilan University from 1967 to 1977. He also co-founded the Institute for Philosophy of Science at Tel Aviv University, and was president of the Association for the Advancement for Science in Israel. He was Visiting Professor at the Swiss Federal Institute of Technology in Zürich, the University of Göttingen, the Institut Henri Poincaré, Columbia University, the Catholic University of America in Washington, D. C., and other universities in the United States and Canada.

He is the father of Rabbi Michael Yammer who is the rosh yeshiva (dean) of Yeshivat Sha’alvim.

Awards received by Jammer include: