The 1978 Norwegian Football Cup was the 73rd edition of the Norwegian annual knockout football tournament. The Cup was won by Lillestrøm after beating Brann in the cup final with the score 2âÂÂ1. This was Lillestrøm's second Norwegian Cup title.
|colspan="3" style="background-color:#97DEFF"|7 June 1978
|- |colspan="3" style="background-color:#97DEFF"|8 June 1978
|- |colspan="3" style="background-color:#97DEFF"|Replay: 15 June 1978
|- |colspan="3" style="background-color:#97DEFF"|2nd replay: 22 June 1978
|colspan="3" style="background-color:#97DEFF"|29 June 1978
|- |colspan="3" style="background-color:#97DEFF"|2 July 1978
|- |colspan="3" style="background-color:#97DEFF"|Replay: Unknown date
|colspan="3" style="background-color:#97DEFF"|25 July 1978
|- |colspan="3" style="background-color:#97DEFF"|26 July 1978
|- |colspan="3" style="background-color:#97DEFF"|27 July 1978
|- |colspan="3" style="background-color:#97DEFF"|29 July 1978
|- |colspan="3" style="background-color:#97DEFF"|30 July 1978
|- |colspan="3" style="background-color:#97DEFF"|2 August 1978
|- |colspan="3" style="background-color:#97DEFF"|3 August 1978
|- |colspan="3" style="background-color:#97DEFF"|Replay: 2 August 1978
|colspan="3" style="background-color:#97DEFF"|23 August 1978
|- |colspan="3" style="background-color:#97DEFF"|24 August 1978
Lillestrøm's winning squad: Arne Amundsen, Per Berg (Arne Dokken 45), Jan Birkelund, Tore Kordahl, Georg Hammer, Frank Grønlund, Gunnar Lønstad, ÃÂivind Tomteberget, Leif Hansen, Tom Lund, Vidar Hansen and Rolf Nordberg.
Brann's team: Jan Knudsen, Helge Karlsen, Bjørn Brandt, Terje Rolland, Tore Nordtvedt, Kjell Rune Pedersen (Ingvar Dalhaug 81), Atle Hellesø, Neil MacLeod, Ingvald Huseklepp, Steinar Aase and Bjørn Tronstad.