Vittorio Gui (14 September 1885 – 16 October 1975) was an Italian conductor and composer.

Gui was born in Rome in 1885. In 1933 Bruno Walter invited him to be guest conductor at the Salzburg Festival.

His 1949 recording of Verdi's opera A Masked Ball has been reissued on CD, as has his 1950 performance of Wagner's Parsifal with Maria Callas. His superb 1962 Abbey Road Studio-1 stereo recording by the Royal Philharmonic Orchestra of Rossini's The Barber of Seville has been released on the Great Recordings of the Century by EMI (5 67765 2). There is also a brilliantly lively recording of The Marriage of Figaro from Glyndebourne on EMI Classics (Gemini), with Sena Jurinac as the Contessa.

In 1954 he conducted Spontini's Agnes von Hohenstaufen at the Maggio Musicale Fiorentino with Franco Corelli, Lucilla Udovich and Giangiacomo Guelfi

Gui also premiered contemporary music, including Luigi Dallapiccola's first major composition, his Partita, in 1933.

He died in Florence in 1975, aged 90.