Loris Tjeknavorian (born 13 October 1937) is an Iranian Armenian composer and conductor. He is one of the most celebrated cultural figures in Armenia, Iran and Austria.

As one of the leading conductors of his generation, he has led international orchestras throughout the world: in Austria, UK, United States’ Canada, Hungary, Copenhagen, Iran, Finland, USSR, Armenia, Thailand, Hong Kong, South Africa, Denmark, and Israel.

As a composer Tjeknavorian has written 6 operas, 5 symphonies, choral works (among them God is Love, The Life of Christ, the oratorio Book of Revelation, and a requiem), chamber music, ballet music, piano and vocal works, concerti for piano, violin, guitar, cello and pipa (Chinese lute), as well as music for documentary and feature films.

His compositions have been performed by major orchestras, including the London Symphony Orchestra, London Philharmonic Orchestra, Halle Orchestra, Philharmonic Orchestra Helsinki, American Symphony Orchestra in New York, Tehran Symphony Orchestra, Johannesburg Symphony Orchestra, Haifa Symphony Orchestra, the Mexico Symphony Orchestra, London Percussion Virtuosi, Strasbourg Percussion Ensemble and English Chamber Orchestra. He has made some 100 recordings with RCA, Philips, EMI, ASV, and others.

His son, Emmanuel Tjeknavorian is an Armenian Austrian violinist and conductor.