The Lilleaker Line (Norwegian: Lilleakerbanen) is a suburban tramway from Skøyen in Oslo westwards to Jar, Bærum in Norway. It is operated by Line 13 from Grefsen to Bekkestua of the Oslo Tramway, operated by Oslo Sporvognsdrift. The line continues on the Oslo Metro west of Jar as part of the Kolsås Line, and as a street tramway on the Oslo tramway system at Skøyen as the Skøyen Line.