Aleksandre "Aleksi" Machavariani (Georgian: ალექსი მაჭავარიანი) (23 September 1913 – 30 December 1995) was a Georgian composer and conductor.
Aleksi Machavariani was born in Gori, Russian Empire. He graduated from the Tbilisi Conservatory in 1936 and remained there for postgraduate studies. He studied composition under Pyotr Ryazanov. Later he joined the faculty, becoming a professor in 1963. He began his artistic career in 1935.
Machavariani produced a number of critically acclaimed plays and ballets, including the ballet "Othello" (1957), the operas "Mat i Sin" (1945), "Den moei Rodini" (1954), the symphony "Piat monologov" (1971; it earned the Shota Rustaveli Prize). He also wrote the music to many theatrical productions, including "Baratashvili" and "Legenda o liubvi". His output includes among other works also a violin concerto (1950), seven symphonies (1947–1992) and six string quartets (the last in 1993).
He was the artistic director of the Georgian State Symphony Orchestra from 1956 till 1958 and directed the Composers' Union of Georgia from 1962 till 1968.