The 2018 Polish Basketball Cup (Polish: Puchar Polski 2018) was the 55th edition of Poland's national cup competition for men basketball teams.

It was managed by the Polish Basketball League (PLK) and was held in Warsaw, in the Arena Ursynów in February 2018.

Polski Cukier Toruń won its first-ever Cup title in club history.

Legia Warsaw qualified as host of the tournament, and gained automatic qualification.

Matches were drawn on 11 January 2018.