"Bohemian Rhapsody" is a song by the British rock band Queen from their fourth album, A Night at the Opera (1975). Written by lead singer Freddie Mercury, the song is a six-minute suite, notable for its lack of a refraining chorus and consisting of several sections: an intro, a ballad segment, an operatic passage, a hard rock part, and a reflective coda. It is one of the few progressive rock songs of the 1970s to achieve widespread commercial success and appeal to a mainstream audience.

Mercury referred to "Bohemian Rhapsody" as a "mock opera" that resulted from the combination of three songs he had written. It was recorded by Queen and co-producer Roy Thomas Baker at five studios between August and September 1975. Due to recording logistics of the era, the band had to bounce the tracks across eight generations of 24-track tape, meaning that they required nearly 200 tracks for overdubs. The song parodies elements of opera with bombastic choruses, sarcastic recitative, and distorted Italian operatic phrases. Lyrical references include Scaramouche, the fandango, Galileo Galilei, Figaro, and Beelzebub, with cries of "Bismillah!"

Although critical reaction was initially mixed, "Bohemian Rhapsody" became regarded as one of the greatest rock songs of all time, as well as Queen's most popular. The promotional video is credited with furthering the development of the music video medium. It has appeared in numerous polls of the greatest songs in popular music, including a ranking at number 17 on Rolling Stone's list of "the 500 Greatest Songs of All Time. A Rolling Stone readers' poll ranked Mercury's vocal performance as the greatest in rock history.

Queen’s epic rock song “Bohemian Rhapsody” began life sometime in the late 60s, when Freddie Mercury was a student at Ealing Art College, starting out as a few ideas for a song scribbled on scraps of paper.

Queen guitarist Brian May remembers the brilliant singer and songwriter giving them the first glimpse in the early 70s of the masterpiece he had at one time called “The Cowboy Song,” perhaps because of the line “Mama… just killed a man.”

“I remember Freddie coming in with loads of bits of paper from his dad’s work, like Post-it notes, and pounding on the piano,” May said in 2008. “He played the piano like most people play the drums. And this song he had was full of gaps where he explained that something operatic would happen here and so on. He’d worked out the harmonies in his head.”

Mercury told bandmates that he believed he had enough material for about three songs but was thinking about blending all the lyrics into one long extravaganza. The final six-minute iconic mini-rock opera became the band’s defining song, and eventually provided the title of the hit 2019 biopic starring Rami Malek as Mercury.