The 2018 King Cup, or The Custodian of the Two Holy Mosques Cup, was the 43rd edition of the King Cup since its establishment in 1957, and the 11th under the current format. It started on 3 January and concluded with the final on 12 May 2018. The winner qualified for the 2019 AFC Champions League group stage. Al-Ittihad won their eighth title after a 3–1 win over Al-Faisaly in the final on 12 May 2018.