The 1986-87 KNVB Cup was the 69th edition of the Dutch national football annual knockout tournament for the KNVB Cup. 46 teams contested, beginning on 11 October 1986 and ending at the final on 5 June 1987.
Ajax beat FC Den Haag 4–2 and won the cup for the eleventh time.
Ajax had won the Cup Winners' Cup tournament this year, therefore the Netherlands were allowed to send two teams to next year's edition of 1987–88. This way, finalists FC Den Haag also qualified.