The Mansfelder Bergwerksbahn is an 11-kilometre (6.8 mi) long 750 mm (2 ft 5+1⁄2 in) gauge heritage railway in Saxony-Anhalt, Germany.

In 1885, a 5.5 kilometres (3.4 mi) long railway opened linking the Glückhilf mine at Welfesholz and the Kupferkammer smeltery at Hettstedt.

[1] By 1930, the railway extended to 95 kilometres (59 mi) of track, serving 13 copper mines and two smelteries, and had interchanges with two station served by standard gauge trains.

Transporter wagons were introduced in the 1930s, as well as air brakes on rolling stock.

10 became the first narrow gauge locomotive in Germany converted to heavy oil fuel.