Jan Erik Tage "Janne" Schaffer (born 24 September 1945) is a Swedish songwriter and guitarist. He is best known for his work as a session guitarist for ABBA but he has also recorded with artists such as Bob Marley, Johnny Nash, Art Farmer and Tony Williams. He also played at the 1977 Montreux Jazz Festival.

Schaffer's 1979 album Earmeal included session work from brothers Jeff, Steve and Mike Porcaro, as well as their father, Joe Porcaro. This is one of the few instances where the entire Porcaro family appears together on one album, the most well-known examples being Toto's Toto IV and The Seventh One.

Schaffer is a member of the Electric Banana Band where he plays guitar as the character 'Zebra'. He also performs with the group The Night Agent. Schaffer received the Albin Hagström Memorial Award in 1999 and in 2005 Illis quorum.