The LNB Pro B, full name, Ligue Nationale de Basket Pro B (English: Pro National Basketball League B), is the second-tier men's professional basketball league in France. It is the second division of the Ligue Nationale de Basket (LNB), which has organized the league since the year 1987. The top two placed teams from each season's Pro B are promoted to the first-tier LNB Pro A (first division).
All 18 Pro B teams play each other twice during the regular season. The top eight regular season teams qualify for the Pro B playoffs. The regular season and playoff champions are promoted to the LNB Pro A (first division), while the bottom two regular season teams are relegated to the amateur Nationale 1 league. The quarterfinals and the semifinals are two-legged, and the final is a single game.