2004–05 Copa del Rey
The 2004–05 Copa del Rey was the 103rd staging of the Copa del Rey.
The competition started on 1 September 2004 and concluded on 1 June 2005 with the Final, held at the Estadio Vicente Calderón in Madrid, in which Real Betis lifted the trophy for the first time since 1977 with a 2–1 victory over CA Osasuna.
First round
Round of 64
Round of 32
Knock-out rounds
Round of 16
First leg
Second leg
Quarterfinals
First leg
Second leg
Semifinals
First leg
Second leg
Final
| Copa del Rey 2004–05 winners |
| Betis 2nd title |