The 1988 Norwegian Football Cup was the 83rd edition of the Norwegian annual knockout football tournament. The Cup was won by Rosenborg after they beat Brann in the final. It took a replay to decide the winner. This was Rosenborg's fourth Norwegian Cup title.
| Norgesmesterskapet i fotball for herrer | |
|---|---|
| Tournament details | |
| Country |  Norway |
| Teams | 128 (main competition) |
| Defending champions | Bryne |
| Final positions | |
| Champions | Rosenborg (4th title) |
| Runner-up | Brann |
First round
editSecond round
edit| Team 1 | Score | Team 2 |
|---|---|---|
| 10 June 1988 | ||
| Molde | 2–0 | Spjelkavik |
| 11 June 1988 | ||
| Geilo | 3–2 | Sogndal |
| Tromsø | 4–2 | Narvik/Nor |
| Nessegutten | 0–1 | Stjørdals/Blink |
| Aalesund | 0–4 | Clausenengen |
| Kristiansund | 7–0 | Hødd |
| 12 June 1988 | ||
| Harstad | 3–3 (5–6 p) | Skarp |
| Vålerengen | 4–3 | Grei |
| Ørn-Horten | 0–1 (a.e.t.) | Moss |
| Kjelsås | 1–0 | Fredrikstad |
| Raufoss | 2–1 | Faaberg |
| Drøbak/Frogn | 1–0 | Larvik Turn |
| Kopervik | 0–1 | Vard Haugesund |
| Brann | 9–1 | Varegg |
| Steinkjer | 1–1 (3–4 p) | Strindheim |
| Skeid | 0–2 | Lillestrøm |
| Råde | 2–1 | Lyn |
| Sandnessjøen | 1–5 | Bodø/Glimt |
| Mjølner | 4–2 | Fauske/Sprint |
| Gjøvik-Lyn | 0–3 | Kongsvinger |
| Alvdal | 5–0 | Sel |
| Rosenborg | 9–0 | Beitstad |
| Pors | 0–4 | Eik-Tønsberg |
| HamKam | 6–1 | Frigg |
| Jerv | 5–5 (5–4 p) | Vidar |
| Start | 5–0 | Gulset |
| Fyllingen | 3–2 | Fana |
| Bryne | 2–0 | Donn |
| Fram Larvik | 1–2 | Mjøndalen |
| Strømmen | 1–0 | Fremad |
| Viking | 3–0 | Randaberg |
| Djerv 1919 | 4–0 | Os |
Third round
edit| Team 1 | Score | Team 2 |
|---|---|---|
| 6 July 1988 | ||
| Skarp | 0–2 | Tromsø |
| Geilo | 0–5 | Vålerengen |
| Moss | 10–0 | Kjelsås |
| Raufoss | 1–4 | Drøbak/Frogn |
| Vard Haugesund | 0–5 | Brann |
| Strindheim | 4–1 | Kristiansund |
| Lillestrøm | 2–3 | Råde |
| Bodø/Glimt | 3–0 | Mjølner |
| Kongsvinger | 1–2 | Alvdal |
| Clausenengen | 0–0 (3–4 p) | Molde |
| Stjørdals/Blink | 1–2 | Rosenborg |
| Eik-Tønsberg | 4–2 (a.e.t.) | HamKam |
| Jerv | 0–4 | Start |
| Fyllingen | 1–0 | Bryne |
| Mjøndalen | 1–0 | Strømmen |
| Viking | 1–0 | Djerv 1919 |
Fourth round
edit| Team 1 | Score | Team 2 |
|---|---|---|
| 3 August 1988 | ||
| Tromsø | 0–1 | Vålerengen |
| Moss | 1–0 | Drøbak/Frogn |
| Brann | 2–0 | Strindheim |
| Alvdal | 0–2 | Molde |
| Rosenborg | 4–3 | Eik-Tønsberg |
| Start | 6–3 (a.e.t.) | Fyllingen |
| Mjøndalen | 4–3 | Viking |
| 4 August 1988 | ||
| Råde | 1–0 | Bodø/Glimt |
Quarter-finals
edit| Team 1 | Score | Team 2 |
|---|---|---|
| 24 August 1988 | ||
| Vålerengen | 0–1 | Moss |
| Brann | 1–0 | Råde |
| Molde | 1–2 (a.e.t.) | Rosenborg |
| Start | 3–1 | Mjøndalen |
