Robert Heger (19 August 1886 – 14 January 1978) was a German conductor and composer from Strasbourg, Alsace-Lorraine.
He studied at the Conservatory of Strasbourg, under Franz Stockhausen, then in Zurich under Lothar Kempter, and finally in Munich under Max von Schillings. After early conducting engagements in Strasbourg he made his debut at Ulm in 1908 or 1909. He held appointments in Barmen (1909), at the Vienna Volksoper (1911), and at Nuremberg (1913), where he also conducted Philharmonic concerts. He progressed to Munich and then to Berlin (1933-1950), after which he returned again to Munich.
In 1932 he conducted the Vienna Symphony Orchestra and the pianist Paul Wittgenstein in the world premiere of Maurice Ravel's Piano Concerto for the Left Hand, after Arturo Toscanini had declined Ravel's invitation to conduct the premiere.
In 1937 Heger joined the Nazi Party.
Heger conducted at the Royal Opera House, Covent Garden, from 1925 to 1935, and again with his Munich company in 1953, when he gave the first London performance of Richard Strauss's opera Capriccio. He died in Munich.