Harry Alfred Robert Kupfer (12 August 1935 – 30 December 2019) was a German opera director and academic. A long-time director at the Komische Oper Berlin, he worked at major opera houses and at festivals internationally. Trained by Walter Felsenstein, he worked in the tradition of realistic directing. At the Bayreuth Festival, he staged Wagner's Der fliegende Holländer in 1978 and Der Ring des Nibelungen in 1988. At the Salzburg Festival, he directed the premiere of Penderecki's Die schwarze Maske in 1986 and Der Rosenkavalier by Richard Strauss in 2014.