O , criado em 1940, é o Oscar entregue para o melhor roteiro que não é baseado em nenhum material publicado anteriormente.
Vencedores e indicados O ano indicado no artigo refere-se ao ano em que ocorreu a entrega do prêmio, relativo ao melhor roteiro original do ano anterior.''
Década de 1940 Ano Filme Roteirista(s) 1941 The Great McGinty Preston Sturges Angels Over Broadway Ben Hecht Dr. Ehrlich's Magic Bullet Norman Burnside Heinz Herald John Huston Foreign Correspondent Charles BennettJoan Harrison The Great Dictator | Charles Chaplin
| rowspan=6 style="text-align:center" | 1942 |- style="background:#FAEB86" | Citizen Kane| Herman J. MankiewiczOrson Welles |- | The Devil and Miss Jones| Norman Krasna |- | Sergeant York| Harry ChandleeAbem FinkelJohn HustonHoward Koch |- | Tall, Dark and Handsome| Karl TunbergDarrell Ware |- | Tom, Dick and Harry| Paul Jarrico
| rowspan=6 style="text-align:center" | 1943 |- style="background:#FAEB86" | Woman of the Year| Michael KaninRing Lardner, Jr. |- | One of Our Aircraft Is Missing | Michael Powell Emeric Pressburger |- | Road to Morocco | Frank ButlerDon Hartman |- | Wake Island | W. R. BurnettFrank Butler |- | The War Against Mrs. Hadley | George Oppenheimer
| rowspan=6 style="text-align:center" | 1944|- style="background:#FAEB86" | Princess O'Rourke| Norman Krasna|- | Air Force | Dudley Nichols |- | In Which We Serve | Noël Coward |- | The North Star | Lillian Hellman |- | So Proudly We Hail! | Allan Scott
| rowspan=6 style="text-align:center" | 1945|- style="background:#FAEB86" | Wilson| Lamar Trotti|- | Hail the Conquering Hero | rowspan="2" | Preston Sturges |- | The Miracle of Morgan's Creek |- | Two Girls and a Sailor | Richard ConnellGladys Lehman |- | Wing and a Prayer | Jerome Cady
| rowspan=6 style="text-align:center" | 1946|- style="background:#FAEB86" | Marie-Louise| Richard Schweizer|- | Dillinger | Philip Yordan |- | Music for Millions | Myles Connolly |- | Salty O'Rourke | Milton Holmes |- | What Next, Corporal Hargrove? | Harry Kurnitz
| rowspan=6 style="text-align:center" | 1947|- style="background:#FAEB86" | The Seventh Veil| Muriel BoxSydney Box|- | The Blue Dahlia | Raymond Chandler |- | Les Enfants du Paradis | Jacques Prévert |- | Notorious | Ben Hecht |- | Road to Utopia | Norman PananaMelvin Frank
| rowspan=6 style="text-align:center" | 1948|- style="background:#FAEB86" | The Bachelor and the Bobby-Soxer| Sidney Sheldon''' |- | Body and Soul| Abraham Polonsky |- | A Double Life| Ruth GordonGarson Kanin |- | Monsieur Verdoux| Charles Chaplin |- | Sciuscià'' Sergio AmideiAdolfo FranciC. G. ViolaCesare Zavattini
Década de 1950 Ano Filme Roteirista(s) 1950 Battleground Robert Pirosh Jolson Sings Again Sidney Buchman Paisà Sergio Amidei Federico Fellini V. Hayes Marcello Pagliero Roberto Rossellini Passport to Pimlico T. E. B. Clarke The Quiet One Helen Slote LevittJanice LoebSidney Meyers 1951 Sunset Boulevard Charles BrackettD. M. Marshman, Jr.Billy Wilder |- | Adam's Rib | Ruth GordonGarson Kanin |- | Caged | Virginia Kellogg Bernard C. Schoenfeld |- | The Men | Carl Foreman |- | No Way Out | Joseph L. MankiewiczLesser Samuels
| rowspan=6 style="text-align:center" | 1952|- style="background:#FAEB86" | An American in Paris| Alan Jay Lerner|- | Ace in the Hole | Walter NewmanLesser SamuelsBilly Wilder |- | David and Bathsheba | Philip Dunne |- | Go for Broke! | Robert Pirosh |- | The Well | Clarence GreeneRussell Rouse
| rowspan=6 style="text-align:center" | 1953|- style="background:#FAEB86" | The Lavender Hill Mob| T. E. B. Clarke|- | The Atomic City | Sydney Boehm |- | The Sound Barrier | Terence Rattigan |- | Pat and Mike | Ruth GordonGarson Kanin |- | Viva Zapata! | John Steinbeck
| rowspan=6 style="text-align:center" | 1954|- style="background:#FAEB86" | Titanic| Charles BrackettRichard BreenWalter Reisch|- | The Band Wagon | Betty ComdenAdolph Green |- | The Desert Rats | Richard Murphy |- | The Naked Spur | Harold Jack BloomSam Rolfe |- | Take the High Ground! | Millard Kaufman
| rowspan=6 style="text-align:center" | 1955|- style="background:#FAEB86" | On the Waterfront| Budd Schulberg|- | The Barefoot Contessa | Joseph L. Mankiewicz |- | Genevieve | William Rose |- | The Glenn Miller Story | Oscar BrodneyValentine Davies |- | Knock on Wood | Melvin FrankNorman Panana
| rowspan=6 style="text-align:center" | 1956|- style="background:#FAEB86" | Interrupted Melody| Sonya LevienWilliam Ludwig|- | The Court-Martial of Billy Mitchell | Emmet LaveryMilton Sperling |- | It's Always Fair Weather | Betty ComdenAdolph Green |- | Les Vacances de monsieur Hulot | Henri MarquetJacques Tati |- | The Seven Little Foys | Jack RoseMelville Shavelson
| rowspan=6 style="text-align:center" | 1957|- style="background:#FAEB86" | Le Ballon rouge| Albert Lamorisse|- | The Bold and the Brave | Robert Lewin |- | Julie | Andrew L. Stone |- | La Strada | Federico FelliniTullio Pinelli |- | The Ladykillers | William Rose
| rowspan=6 style="text-align:center" | 1958|- style="background:#FAEB86" | Designing Woman| George Wells|- | Funny Face | Leonard Gershe |- | Man of a Thousand Faces | Ben Roberts R. Wright Campbell Ivan Goff Ralph Wheelwright |- | The Tin Star | Joel Kane Dudley Nichols Barney Slater |- | I Vitelloni | Federico Fellini Ennio Flaiano Tullio Pinelli
| rowspan=6 style="text-align:center" | 1959|- style="background:#FAEB86" | The Defiant Ones| Nedrick YoungHarold Jacob Smith'|- | The Goddess| Paddy Chayefsky |- | Houseboat| Melville ShavelsonJack Rose |- | The Sheepman| William Bowes James Edward Grant |- | Teacher's Pet'' Fay KaninMichael Kanin
Década de 1960 Ano Filme Roteirista(s) 1960 Pillow Talk Clarence Green Maurice Richlin Russell Rouse Stanley Shapiro |- | Les Quatre Cents Coups | Marcel Moussy François Truffaut |- | North by Northwest | Ernest Lehman |- | Operation Petticoat | Paul King Maurice Richlin Joseph Stone Stanley Shapiro |- | Smultronstället | Ingmar Bergman
| rowspan=6 style="text-align:center" | 1961|- style="background:#FAEB86" | The Apartment| I. A. L. DiamondBilly Wilder|- | The Angry Silence | Michael Craig Richard Gregson Bryan Forbes |- | The Facts of Life | Melvin FrankNorman Panana |- | Hiroshima mon amour | Marguerite Duras |- | Pote Tin KyriakiΠοτέ Την Κυριακή | Jules Dassin
| rowspan=6 style="text-align:center" | 1962|- style="background:#FAEB86" | Splendor in the Grass| William Inge|- | Ballada o Soldate | Grigori ChukhraiValentin Yoshov |- | La Dolce Vita | Federico Fellini Ennio Flaiano Tullio Pinelli Brunello Rondi |- | Il Generale della Rovere | Sergio Amidei Diego Fabbi Indro Montanelli |- | Lover Come Back | Paul HenningStanley Shapiro
| rowspan=6 style="text-align:center" | 1963|- style="background:#FAEB86" | Divorzio all'Italiana| Ennio de ConciniPietro GermiAlfredo Giannetti|- | Freud: The Secret Passion | Charles Kaufman Wolfgang Reinhardt |- | L'Année Dernière à Marienbad | Alain Robbe-Grillet |- | That Touch of Mink | Nate MonasterStanley Shapiro |- | Såsom i en Spegel | Ingmar Bergman
| rowspan=6 style="text-align:center" | 1964|- style="background:#FAEB86" | How the West Was Won| James Webb|- | 8½ | Federico Fellini Ennio Flaiano Tullio Pinelli Brunello Rondi |- | America, America | Elia Kazan |- | Le quattro giornate di Napoli | Carlo Bernari Pasquale Festa Campanile Massimo Franciosa Nanni Loy Vasco Pratolini |- | Love with the Proper Stranger | Arnold Schulman
| rowspan=6 style="text-align:center" | 1965|- style="background:#FAEB86" | Father Goose| Peter StoneFrank Tarloff|- | A Hard Day's Night | Alum Owen |- | One Potato, Two Potato | Orville H. Hampton Raphael Hayes |- | I Compagni | AgeFurio ScarpelliMario Monicelli |- | L'Homme de Rio | Daniel BoulangerPhilippe de BrocaAriane MnouchkineJean-Paul Rappeneau
| rowspan=6 style="text-align:center" | 1966|- style="background:#FAEB86" | Darling| Frederic Raphael|- | Casanova '70 | AgeFurio ScarpelliSuso Cecchi d'AmicoTonino GuerraMario MonicelliGiorgio Salvioni |- | Those Magnificent Men in Their Flying Machines | Ken AnnakinJack Davies |- | The Train | Franklin CoenFrank Davis |- | Les Parapluies de Cherbourg | Jacques Demy
| rowspan=6 style="text-align:center" | 1967|- style="background:#FAEB86" | Un homme et une femme| Claude Lelouch Pierre Uytterhoeven |- | Blow-Up | Michelangelo Antonioni Tonino Guerra Edward Bond |- | The Fortune Cookie | I. A. L. DiamondBilly Wilder |- | Khartoum | Robert Ardrey |- | The Naked Prey | Clint JohnsonDon Peters
| rowspan=6 style="text-align:center" | 1968|- style="background:#FAEB86" | Guess Who's Coming to Dinner| William Rose|- | Bonnie and Clyde | Robert BentonDavid Newman |- | Divorce American Style | Robert Kaufman Norman Lear |- | La Guerre est Finie | Jorge Semprún |- | Two for the Road | Frederic Raphael
| rowspan=6 style="text-align:center" | 1969|- style="background:#FAEB86" | The Producers| Mel Brooks'|- | 2001: A Space Odyssey| Arthur C. ClarkeStanley Kubrick |- | La battaglia di Algeri| Gillo PontecorvoFranco Solinas |- | Faces| John Cassavetes |- | Hot Millions'' Peter UstinovIra Wallach
Década de 1970 Ano Filme Roteirista(s) 1970 Butch Cassidy and the Sundance Kid William Goldman Bob & Carol & Ted & Alice Paul MazurskyLarry Tucker La Caduta Degli Dei Nicola Badalucco Enrico Medioli Luchino Visconti Easy Rider Peter FondaDennis HopperTerry Southern The Wild Bunch Walon Green Sam Peckinpah Roy N. Sickner 1971 Patton Francis Ford CoppolaEdmund H. North Five Easy Pieces Carole EastmanBob Rafelson Joe Norman Wexler Love Story Erich Segall Ma Nuit chez Maud Éric Rohmer 1972 The Hospital Paddy Chayefsky Indagine su un Cittadino al di Sopra di Ogni Sospetto Elio PetriUgo Pirro Klute Andy LewisDavid Lewis Summer of '42 Herman Raucher Sunday Bloody Sunday Penelope Gilliatt 1973 The Candidate Jeremy Larner Le Charme Discret de la Bourgeoisie Luis BuñuelJean-Claude Carrière Lady Sings the Blues Chris ClarkTerrence McCloy Le Souffle au Cœur Louis Malle Young Winston Carl Foreman 1974 The Sting David S. Ward American Graffiti Willard HuyckGloria KatzGeorge Lucas Viskningar och rop Ingmar Bergman Save the Tiger Steve Shagan A Touch of Class Melvin Frank Jack Rose 1975 Chinatown Robert Towne Alice Doesn't Live Here Anymore Robert Getchell The Conversation Francis Ford Coppola La Nuit Américaine Jean-Louis RichardSuzanne SchiffmanFrançois Truffaut Harry and Tonto Josh GreenfeldPaul Mazursky 1976 Dog Day Afternoon Frank Pierson Amarcord Federico Fellini Tonino Guerra Toute Une Vie Claude LelouchPierre Uytterhoeven Lies My Father Told Me Ted Allen Shampoo Warren BeattyRobert Towne 1977 Network Paddy Chayefsky Cousin, Cousine Jean-Charles Tacchella Daniele Thompson The Front Walter Bernstein Rocky Sylvester Stallone Pasqualino Settebellezze Lina Wertmüller 1978 Annie Hall Woody AllenMarshall Brickman The Goodbye Girl Neil Simon The Late Show Robert Benton Star Wars George Lucas The Turning Point Arthur Laurents 1979 Coming Home Nancy Dowd Robert C. Jones Waldo Salt Höstsonaten Ingmar Bergman The Deer Hunter Michael Cimino Louis Garfinkle Quinn K. Redeker Deric Washburn Interiors Woody Allen An Unmarried Woman Paul Mazursky
Década de 1980