| Competition: | Algerian Championnat National |
| Season: | 2003–04 |
| Winners: | JS Kabylie |
| Relegated: | CA Batna RC Kouba JSM Béjaïa |
| League Topscorer: | Adel El Hadi (17 goals) |
| Biggest Home Win: | CA Bordj Bou Arreridj 5 - 0 JSM Béjaïa USM Annaba 5 - 0 US Chaouia |
| Biggest Away Win: | JSM Béjaïa 0 - 6 USM Alger |
| Highest Scoring: | JSM Béjaïa 0 - 6 USM Alger USM Blida 5 - 1 JSM Béjaïa |
| Matches: | 240 |
| Total Goals: | 506 |
| Prevseason: | 2002–03 |
| Nextseason: | 2004–05 |
The 2003–04 Algerian Championnat National was the 42nd season of the Algerian Championnat National since its establishment in 1962. A total of 16 teams contested the league, with USM Alger as the defending champions, The Championnat started on August 14, 2003. and ended on May 24, 2004.
Teams promoted from Algerian Division 2 2003-2004
Teams relegated to Algerian Division 2 2004-2005