The 2003–04 season was the 35th campaign of the Scottish Men's National League, the national basketball league of Scotland.
The season featured 10 teams; from the previous season, St Mirren Buddies joined the league and Arbroath Musketeers did not return.
City of Edinburgh Kings won their second league title with an unbeaten season.
[1] The line-up for the 2003–04 season featured the following teams: Source: Scottish National League 2003-04 - Britball Archived 2008-10-06 at the Wayback Machine