2003–04 British Basketball League season

The 2003–04 BBL season was the 17th campaign in the history of the British Basketball League.

Notable occurrences

 * Due to uncertainty regarding the future of Aston Events Centre, the Birmingham Bullets were forced to relocate to a new home venue. Their first games of the campaign were postponed until a suitable venue could be found, with the owner Craig Bown eventually acquiring the use of Birmingham Sports Centre for the duration of the season.
 * With their 68–66 win in the BBL Trophy Final against Brighton Bears, Chester Jets made history as the first team to win the Trophy for four consecutive seasons.

Haribo Cup
This season saw the first edition of the newly created Haribo Cup. Following the BBL's decision to withdraw from the National Cup due to import player regulations, the League's newest competition saw all 10 teams competing in a knock-out style tournament culminating in the Grand Final at the National Indoor Arena in Birmingham.

BBL Trophy
Due to the lack of teams competing in this season's Championship, the BBL Trophy featured all 10 BBL teams plus two invited teams from the English Basketball League (Plymouth Raiders and Teesside Mohawks). The First round saw all 12 teams divided into four regionalised groups with the top finishing team advancing to the Semi-finals.

Group stage
Northern Group 1

Southern Group 1

Northern Group 2

Southern Group 2