Airto Guimorvan Moreira (born August 5, 1941) is a Brazilian jazz drummer and percussionist. He is married to jazz singer Flora Purim, and their daughter Diana Moreira is also a singer. Coming to prominence in the late 1960s as a member of the Brazilian ensemble Quarteto Novo, he moved to the United States and worked in jazz fusion with Miles Davis and Return to Forever.

Airto Moreira was born in Itaiópolis, Brazil, into a family of folk healers, and raised in Curitiba and São Paulo. Showing an extraordinary talent for music at a young age, he became a professional musician at age 13, noticed first as a member of the samba jazz pioneers Sambalanço Trio and for his landmark recording with Hermeto Pascoal in Quarteto Novo in 1967. Shortly after, he followed his wife Flora Purim to the United States.

After moving to the US, Moreira began playing regularly with jazz musicians in New York, including the bassist Walter Booker. Through Booker, Moreira began playing with Joe Zawinul, who in turn introduced him to Miles Davis. At this time Davis was experimenting with electronic instruments and rock and funk rhythms, a form which would soon come to be called jazz fusion. Moreira was to participate in several of the most important projects of this emerging musical form. He stayed with Davis for about two years, touring and participating in the creation of the seminal fusion recording Bitches Brew (1970).

Shortly after leaving Davis, Moreira joined other Davis alumni Zawinul, Wayne Shorter and Miroslav Vitous in their group Weather Report, playing percussion on their first album (1971). He left Weather Report (replaced by Dom Um Romão and Muruga Booker for their Sweetnighter album) to join fellow Davis alumnus Chick Corea‘s new band Return to Forever. He played drums on Return to Forever’s first two albums: Return to Forever and Light as a Feather in 1972.