NSB El 9 is a retired class of three electric locomotives built by Thune for the Norwegian State Railways (NSB), with electrical equipment from Norsk Elektrisk & Brown Boveri (NEBB) and Per Kure. The locomotives were delivered in 1947 after a three-year delay caused by wartime sabotage in response to the German occupation of Norway. They were used nearly exclusively on the Flåm Line and Hardanger Line, two steep branch lines. The units were used on the Flåm Line until 1983, when they were replaced by El 11. They were then used as shunters until being retired in 1988. Two of the locomotives have been preserved.