The 2017–18 KNVB Cup was the 100th season of the annual Dutch national football cup competition. It commenced on 19 September 2017 with the first of six rounds and concluded on 22 April 2018 with the final at De Kuip in Rotterdam.

The KNVB Beker, branded as the TOTO KNVB Beker for sponsorship reasons, is a competition in the Netherlands organized by the Royal Dutch Football Association (KNVB) since 1898. It was based on the format of the English FA Cup. Outside the Netherlands, it is often referred to as the Dutch Cup. The tournament consists of all teams from the top four tiers of Dutch league football, as well as the 24 semi-finalists of the six KNVB District Cups. The finals of the tournament traditionally takes place in De Kuip, and has been held there every season since the 1989 final. The winners of the cup compete against the winners of the Eredivisie for the Johan Cruyff Shield, which acts as the curtain raiser for the following season.