The 2018–19 Novo Basquete Brasil (NBB) season is the 11th season of this top-tier level Brazilian professional basketball league. This tournament is organized by the Liga Nacional de Basquete (LNB). The NBB will also qualify teams for international tournaments such as the FIBA South American League (LSB) and FIBA Americas League. For this season, the last regular season placed team is relegated to the 2020 Liga Ouro, the NBB's second tier division. Also, only the 2019 Liga Ouro winner receives the right to play in the NBB 2019–20 season.