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Rudolf Keller (16 June 1917 - 28 November 1993) was a German chess master.
Born in Dresden, he was the brother of Edith Keller-Herrmann. In 1935-1938, he won Dresden and Saxony championships. He took 4th at Berlin 1938, shared 1st with Ludwig Rellstab and Paul Michel at Bad Warmbrunn 1939, played in a match Germany vs. Hungary in Karlsbad in April 1939, tied for 6-7th at Vienna 1939, shared 6th at Bad Oeynhausen 1939 (the 6th German Chess Championship, Erich Eliskases won), tied for 6-9th at Bad Oeynhausen 1940 (the 7th GER-ch, Georg Kieninger won), took 2nd, behind Klaus Junge, at Dresden 1942, tied for 9-10th at Choceň 1942 (Miroslav Katětov won), and tied for 4-5th at Warsaw/Lublin/Kraków 1942 (the 3rd General Government chess tournament won by Alexander Alekhine).
After World War II, he won the Saxony championships in 1949, and played in a match GDR vs. CSR in 1957. He was awarded the International Master title in 1950.