Piala Raja Saudi 2018

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. Pro League side Al-Hilal were the defending champions, but they were eliminated by Al-Qadsiah in the Round of 16. It was the earliest exit by the title holders since the introduction of the new format.