2009–10 KNVB Cup
| Tournament details | |
|---|---|
| Country | Netherlands |
| Teams | 88 |
| Defending champions | SC Heerenveen |
| Final positions | |
| Champions | AFC Ajax |
| Runners-up | Feyenoord |
| Tournament statistics | |
| Top goal scorer(s) | Luis Suarez (8) |
The 2009–10 KNVB Cup was the 92nd edition of the Dutch national football knockout tournament for the KNVB Cup. 88 teams contested beginning on 29 August 2009 with the matches of Round 1 and culminated with a double-leg Final on 25 April and 6 May 2010 respectively.
SC Heerenveen unsuccessfully defended its 2009 title losing in Round 4 to PSV, 1–3.
On 15 April, the Royal Dutch Football Association (KNVB) announced that the final was to be played over two matches due to imminent supporter violence. The first leg of the final was staged in Amsterdam on April 25, with Ajax defeating Feyenoord 2–0, in the rivalry known as Klassieker. The return followed on 6 May in Rotterdam, with Ajax winning 4–1 and 6–1 on aggregate. Ajax qualified for the play-off round of the 2010–11 UEFA Europa League.