Roger Maxwell Chapman (born 8 April 1942 in Leicester), also known as Chappo, is an English rock vocalist.

His idiosyncratic brand of showmanship when performing and vocal vibrato led him to become a cult figure on the British rock scene.

Chapman wrote most of Family's songs with Charlie Whitney and their debut album Music in a Doll's House was released in 1968.

Their bluesy, experimental rock music gained them a reputation as a progressive underground band.

Mike Oldfield's song "Shadow on the Wall" from the album Crises (1983) featured Chapman on vocals and became a hit.

[7] He appeared as a guest artist on the second Box of Frogs album Strange Land (1986) singing lead vocals on two songs.