The 2018 Copa del Rey de Baloncesto was the 82nd edition of the Spanish King's Basketball Cup, won by FC Barcelona Lassa against former 4-time reigning champions Real Madrid.

The competition is managed by the ACB and was held in Las Palmas, in the Gran Canaria Arena in February 2018.

The 2018 Copa del Rey de Baloncesto was drawn on 23 January 2018 at approximately 11:30 and was broadcast live on YouTube and on TV in many countries.

As in recent seasons, the first qualified team plays its quarterfinal game on Thursday.

In the previous week of the Cup, the Basketball Players Association (ABP) called for a strike on 14 February, thus trying to stop the Cup if the ACB do not accept their requirements, in the negotiation of the new collective agreement, including the subsidy of €315,000 from the league to the players' trade union.