The Gamlebyen Line (Norwegian: Gamlebylinjen) was a section of the Oslo Tramway which ran east from Jernbanetorget along Schweigaards gate (street), past the Bjørvika then turns south along Oslo gate, and past Gamlebyen before becoming the Ekeberg Line.

The line was opened by Kristiania Sporveisselskab in 1875 as a horsecar route between Stortorvet and Gamlebyen.

They would then run along an elevated line along Schweigaards gate to Vaterland, and from there in a tunnel to a terminus at Stortorvet.

[1] In 1937, Ekebergbanen proposed a line south of Oslo gate on a bridge over Kongsveien, Oslo gate and the railway tracks, and then along Kanslergata to the proposed elevated line in Hollendergata.

This terminated plans for rebuild the downtown section of the Ekeberg Line.