The 1977–78 season of the Moroccan Throne Cup was the 22nd edition of the competition.
Wydad Athletic Club won the cup, beating Renaissance de Kénitra 3–0 in the final, played at the Stade Saniat Rmel in Tetouan. Wydad Athletic Club won the competition for the second time in their history.
Competition Last 16 Team 1 Team 2 Result Crédit agricole Rabat AS Salé 1–2 Chabab Mohammédia Amal Club de Belksiri 5–2 Union de Mohammédia Difaâ Hassani El Jadidi 1–2 Wydad Athletic Club TAS de Casablanca 1–0 Renaissance de Kénitra Renaissance de Settat 2–1 Fath Union Sport Maghreb de Fès 0–1 Amal Belksiri Difaâ Hassani El Jadidi 1–2 Wydad de Fès Raja d'Agadir 1–0
Quarter-finals Team 1 Team 2 Result Chabab Mohammédia Raja d'Agadir 1–0 AS Salé Difaâ Hassani El Jadidi 1–2 Renaissance de Kénitra FAR de Rabat 3–1 Wydad Athletic Club Maghreb de Fès 2–0
Semi-finals Team 1 Team 2 Result Wydad Athletic Club Difaâ Hassani El Jadidi 2–1 Renaissance de Kénitra Chabab Mohammédia 1–0
Final The final took place between the winners of the two semi-finals, Wydad Athletic Club and Renaissance de Kénitra, on 16 July 1978 at Stade Saniat Rmel in Tanger.
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