Plastic Ono Band is a band concept announced by John Lennon and Yoko Ono in 1969 before the dissolution of the Beatles.

Lennon and Ono had begun a personal and artistic relationship in 1968 by collaborating on the experimental album Unfinished Music No.1: Two Virgins. After a second volume, Unfinished Music No.2: Life with the Lions appeared in the spring of 1969, they decided that all of their future endeavours would be credited to a conceptual and collaborative vehicle, 'Plastic Ono Band'.