| Competition: | Algerian Championnat National |
| Season: | 2005–06 |
| Winners: | JS Kabylie |
| Relegated: | CS Constantine USM Annaba US Biskra |
| Continentalcup1: | 2007 CAF Champions League |
| Continentalcup1 Qualifiers: | JS Kabylie USM Alger |
| Continentalcup2: | 2007 CAF Confederation Cup |
| Continentalcup2 Qualifiers: | ASO Chlef MC Alger (Cup winner) |
| Continentalcup3: | 2006–07 Arab Champions League |
| Continentalcup3 Qualifiers: | MC Alger ES Setif CA Bordj Bou Arreridj |
| League Topscorer: | Hamid Berguiga (18 goals) |
| Biggest Home Win: | JS Kabylie 5 - 0 US Biskra |
| Biggest Away Win: | MC Oran 2 - 6 Paradou AC |
| Highest Scoring: | MC Oran 2 - 6 Paradou AC |
| Matches: | 240 |
| Total Goals: | 520 |
| Prevseason: | 2004–05 |
| Nextseason: | 2006–07 |
The 2005–06 Algerian Championnat National was the 44th 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.
Teams promoted from Algerian Division 2 2005-2006
Teams relegated to Algerian Division 2 2006-2007
| Rank | Scorer | Club | Goals | |
|---|---|---|---|---|
| 1 | Hamid Berguiga | JS Kabylie | 18 | |
| 2 | Mohamed Messaoud | ASO Chlef | 15 | |
| 3 | Isaad Bourahli | ES Sétif | 14 | |
| 4 | Noureddine Daham | MC Alger | 13 | |
| align=center rowspan="3" | 5 | Fares Djabelkheir | USM Annaba | 10 |
| Lamouri Djediat | Paradou AC | 10 | ||
| Moulay Haddou | USM Alger | 10 | ||
| 8 | CS Constantine | 9 |