The 1988 King Cup was the 30th season of the knockout competition since its establishment in 1956. Al-Nassr were the defending champions but they were eliminated by eventual champions Al-Ittihad in the semi-finals.[1]
Both Al-Ettifaq and Ohod received a bye to the next round. Al-Ettifaq received due to their participation in the 1988 Gulf Club Champions Cup. Ohod received a bye to the lack of teams participating in this round.[5] The matches of the Round of 16 were held on 31 March and 1 April 1988.[6][7]
The final was played between Al-Ittihad and Al-Ettifaq in the King Fahd Stadium in Riyadh.[11] Al-Ittihad were appearing in their 11th final while Al-Ettifaq were making their 6th appearance.