Iván Fischer (born 20 January 1951) is a Hungarian conductor and composer. Born in Budapest into a musical family (his older brother, Ádám Fischer, is also a conductor), Fischer initially studied piano, violin, cello and composition in Budapest. He moved later to Vienna to study conducting with Hans Swarowsky at the University of Music and Performing Arts, where he also studied cello and early music, studying and working as assistant to Nikolaus Harnoncourt.

In 1976, Fischer won the Rupert Foundation conducting competition in London. He began thereafter to guest-conduct such British orchestras as the BBC Symphony and the London Symphony Orchestra, with whom he conducted a world tour in 1982. His US conducting debut was with the Los Angeles Philharmonic Orchestra in 1983.