This Is The Moody Blues is a two LP compilation album by the Moody Blues, released in late 1974 while the band was on a self-imposed sabbatical. Though all of the songs were previously released on albums, several of them are heard here in distinctly different mixes. Like the Moody Blues albums of the time – but unlike most compilation albums, including later Moody Blues compilations – the songs on this album segue seamlessly, without silence between tracks. On the original LP, this was true of the songs on each side; when the album was remastered for CD, each disc was also blended, so that "Legend of a Mind" segues into "In the Beginning", and "Watching and Waiting" segues into "I'm Just a Singer ".

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".