Michael Thomas Pinder was an English rock musician. He was a founding member and the original keyboard player of the rock group the Moody Blues. He left the group following the recording of the band's ninth album Octave in 1978. Pinder was renowned for his technological contributions to rock music, most notably in the development and emergence of the Mellotron in 1960s rock music. In 2018, he was inducted into the Rock and Roll Hall of Fame as a member of the Moody Blues. He was the last surviving member of the group's original lineup.

The Moody Blues were an English rock band formed in Birmingham in May 1964. The band initially consisted of drummer Graeme Edge, guitarist/vocalist Denny Laine, keyboardist/vocalist Mike Pinder, multi-instrumentalist/vocalist Ray Thomas, and bassist/vocalist Clint Warwick. Originally part of the British beat and R&B scene of the early–mid 1960s, the band came to prominence with the UK No. 1 and US Top 10 single "Go Now" in late 1964/early 1965. Laine and Warwick left the band by the end of 1966, being replaced by guitarist/vocalist Justin Hayward and bassist/vocalist John Lodge. They embraced the psychedelic rock movement of the late 1960s, with their second album, 1967's Days of Future Passed, being a fusion of rock with classical music that established the band as pioneers in the development of art rock and progressive rock. It has been described as a "landmark" and "one of the first successful concept albums".