The Plastic Ono Band was a conceptual art-based rock band formed by John Lennon and Yoko Ono in 1968 for their collaborative and solo projects.The name, and its Fluxus idea of an open-ended plastic band, was first conceived of by Ono in 1967 as an idea for an art exhibition in Berlin. The Plastic Ono Band was first realized in 1968 as a multi-media machine maquette by John Lennon, also called The Plastic Ono Band. In 1968, Lennon and Ono began a personal and artistic relationship (they married in 1969) in which they decided to credit their future endeavors as the work of The Plastic Ono Band. Ono and Lennon collaborated on several art exhibitions, concerts, happenings and experimental noise music recording projects, before recording and releasing somewhat more standard rock-based albums that were still connected to the Plastic Ono Band concept.
The Plastic Ono Band featured a rotating line-up of musicians, including Eric Clapton, Klaus Voormann, Alan White, Billy Preston, Jim Keltner, Keith Moon, Delaney & Bonnie and Friends, and Lennon's former Beatles bandmates George Harrison and Ringo Starr. After Lennon and Ono moved to New York in 1971, they collaborated with Elephant's Memory under the name "Plastic Ono Elephant's Memory Band". Lennon's collaborations continued under similar names until 1974.
From 2009 (29 years after Lennon was murdered) to 2015, Ono and her son Sean Lennon led a new incarnation of the group, the Yoko Ono Plastic Ono Band.