Sui Generis was an influential rock band from Argentina formed by musicians Charly García and Nito Mestre.

The band's repertoire, composed and arranged in most part by García, went from their earlier, simple folk-style guitar tunes that incorporated small elements of classical music (taking advantage of Garcia's conservatory training)[1] to their more developed symphonic/prog rock sound of their later releases.

In its early life, Sui Generis experimented with psychedelic music but would eventually refine and change its sound and is now generally classified as folk-rock.

Soon after Sui Generis started to gain fame, García, then 20 years old, had to take a break from the band to fulfill his mandatory military service.

Unhappy in the service, he pulled outrageous stunts, such as reportedly taking a corpse in a wheelchair for a walk in the sun because "he was too pale".

Eventually, García swallowed a large dose of amphetamines and faked a heart attack, in an apparent attempt to cut short his military service.

Charly's initial concept was to write a song for every influential traditional institution: the Catholic Church, the government, the family, the judicial system, the police, the Army, and so on.

Two more had to be partly changed, "Las increíbles aventuras del Señor Tijeras" ("The incredible adventures of Mr. Scissors"), a song about the person in charge of film censorship at that time, and "¿Para quién canto yo entonces?"

The Há sido LP was never recorded, but some of the songs were included in the band's farewell live album, such as "Bubulina" and "Eiti Leda".