The 1988-89 KNVB Cup was the 71st edition of the Dutch national football annual knockout tournament for the KNVB Cup.
64 teams contested, beginning on 1 October 1988 and ending at the final on 25 May 1989.
PSV beat FC Groningen 4–1 and won the cup for the fifth time.
E Eredivisie; 1 Eerste Divisie; A Amateur teams The matches of the second round were played on November 18, 19 and 20, 1988.
PSV also won the Dutch Eredivisie championship, thereby taking the double.