Richard O. Fleischer (December 8, 1916 – March 25, 2006) was an American film director whose career spanned over four decades, beginning at the height of the Golden Age of Hollywood and lasting through the American New Wave.
Though he directed films across many genres and styles; he is best known for his big-budget, "tentpole" films, including 20,000 Leagues Under the Sea (1954), The Vikings (1958), Barabbas (1961), Fantastic Voyage (1966), the musical film Doctor Dolittle (1967), the epic Tora! Tora! Tora! (1970), the dystopian mystery-thriller Soylent Green (1973), the controversial period drama Mandingo (1975), and the Robert E. Howard sword-and-sorcery films Conan the Destroyer (1984) and Red Sonja (1985). His other directorial credits include the Academy Award-winning documentary Design for Death (1947), the gritty noir The Narrow Margin (1952), the true-crime dramas Compulsion (1959) and The Boston Strangler (1968), the mob action film The Don Is Dead (1973), the swashbuckler The Prince and the Pauper (1977), the 1980 remake of The Jazz Singer, and the horror sequel Amityville 3-D (1983).