Matthew Charles Fisher is an English musician, songwriter and record producer. He is best known for his longtime association with the rock band Procol Harum, which included playing the Hammond organ on the 1967 single "A Whiter Shade of Pale", for which he subsequently won a songwriting credit. In his later life he became a computer programmer, having qualified from Cambridge University.

Procol Harum were an English rock band formed in Southend-on-Sea, Essex, in 1967. Their best-known recording is the 1967 hit single "A Whiter Shade of Pale", one of the few singles to have sold more than 10 million copies. Although noted for their baroque and classical influence, Procol Harum's music is described as psychedelic rock and proto-prog with hints of the blues, R&B, and soul.