The 2003–04 Turkish Cup was the 42nd edition of the annual tournament that determined the association football Super League (Süper Lig) Turkish Cup (Turkish: Türkiye Kupası)[1] champion under the auspices of the Turkish Football Federation (Turkish: Türkiye Futbol Federasyonu; TFF).
Trabzonspor defended its 41st edition achievement in a rematch with Gençlerbirliği 4–0.
The results of the tournament also determined which clubs would be promoted or relegated.