The 2005–06 Crown Prince Cup was the 31st season of the Saudi premier knockout tournament since its establishment in 1957. It started with the qualifying rounds on 24 November 2005 and concluded with the final on 7 April 2006. Al-Hilal were the defending champions, having won the trophy in 2005, and won their second consecutive title, defeating Al-Ahli in the final on 7 April 2006. As winners of the tournament, Al-Hilal qualified for the 2007 AFC Champions League group stage.