The 1977–78 Algerian Cup was the 16th edition of the Algerian Cup. JS Kawkabi were the defending champions, having beaten NA Hussein Dey 2–1 in the previous season's final.
| كأس الجزائر | |
|---|---|
| Tournament details | |
| Country |  Algeria |
| Defending champions | JS Kawkabi (1) |
| Final positions | |
| Champions | CM Belcourt (4) |
| Runner-up | USM Alger |
Round of 64
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Round of 32
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Round of 16
edit| 1978 | MA Hussein Dey | 0 – 0 (a.e.t.) (7 - 6 p) | MP Alger | Stade 5 Juillet 1962, Algiers |
| 1978 | CM Belcourt | 1 – 0 | CN Batna |
| 1978 | EP Sétif | 3 – 1 | USS Méchria |
| 1978 | USK Alger | 3 – 0 | Nadit Oran |
| 1978 | NARB Réghaïa | 2 – 0 | MRB Meftah |
| 1978 | ASC Oran | 2 – 2 | El Asnam TO |
Quarter-finals
edit| 1978 | CM Belcourt | 1 – 0 | ES Sétif | Stade 17 juin, Constantine |
| 1978 | USM Alger | 5 – 2 | NARB Réghaïa | , |
| 1978 | MC Oran | 1 – 0 | NA Hussein Dey | , |
Semi-finals
edit| 23 April 1978 first leg | CM Belcourt | 0 – 0 | MC Oran | , |
| 27 April 1978 Second leg | MC Oran | 0 – 0 (a.e.t.) (5 - 4 p) | CM Belcourt | , |
Final
editMatch
edit| CM Belcourt | 0 - 0 (a.e.t) | USM Alger |
|---|---|---|
| Penalties | ||
| 3 - 0 | ||