The 2004–05 Crown Prince Cup was the 30th season of the Saudi premier knockout tournament since its establishment in 1957.
It started with the qualifying rounds on 8 December 2004 and concluded with the final on 13 May 2005.
Al-Ittihad were the defending champions, but were eliminated in the semi-finals by Al-Hilal.
[1] Al-Hilal won their 5th title following a 2–1 win over Al-Qadisiyah in the final.
[2] The winner of the Crown Prince Cup earns automatic qualification to the 2006 AFC Champions League group stages.