The Hardanger Line (Norwegian: Hardangerbana or Hardangerbanen) was a 27.45-kilometre (17.06 mi) railway between Voss and Granvin in Hordaland, Norway. The line connected to the Bergen Line in Voss, and ran to the Hardangerfjord and the district of Hardanger. Construction started in 1921, but the line did not open until 1 April 1935. Owned and operated by the Norwegian State Railways (NSB), the passenger transport was provided by three NSB Class 64 electric multiple units.