BC Castors Braine (English: Basketball Club Braine Beavers) is a basketball club, with both men's and women's sections, based in the municipality of Braine-l'Alleud, Belgium.

The women's team plays in the National First Division and won the title in 2014.

They followed the title by being runners-up in the 2014–15 EuroCup Women, the first Belgian team to reach a European final.

At the beginning of the 2015–2016 season, the Royal Castors Braine took the name of Mithra Castors Braine following the partnership with Mithra Pharmaceuticals [fr], including the presentation of the team in the FIBA Europe site for Euroligue.

[3] Belgian Women's Basketball League First National Division (tier 1)