2005–06 Torneo Argentino A

The 2005–06 Argentine Torneo Argentino A was the eleventh season of third division professional football in Argentina. A total of 24 teams competed; the champion was promoted to Primera B Nacional.

Final stage
1: Qualified because of sport advantage.
 * Note: The team in the first line plays at home the second leg.

Final stage
1: Qualified because of sport advantage.
 * Note: The team in the first line plays at home the second leg.

Promotion/relegation playoff B Nacional-Torneo Argentino A

 * San Martín (T) was promoted to 2006–07 Primera B Nacional by winning the playoff and San Martin (T) was relegated to 2006–07 Torneo Argentino A.

Relegation playoff Qualifying

 * Lujan de Cuyo remains in Torneo Argentino A and Racing (O) played the Relegation Playoff.


 * Gimnasia y Esgrima (CdU) remains in Torneo Argentino A and Atlético Candelaria played the Relegation Playoff.

Additional Playoff

 * General Paz Juniors plays the Relegation Playoff and Cipolletti was relegated to 2006–07 Torneo Argentino B.

Relegation playoff
!colspan="5"|Relegation/promotion playoff 1

!colspan="5"|Relegation/promotion playoff 2

!colspan="5"|Relegation/promotion playoff 3


 * Rivadavia (L) was promoted to 2006–07 Torneo Argentino A by winning the playoff and Racing (O) was relegated to 2006–07 Torneo Argentino B.
 * Real Arroyo Seco was promoted to 2006–07 Torneo Argentino A by winning the playoff and Atlético Candelaria was relegated to 2006–07 Torneo Argentino B.
 * Alumni (VM) was promoted to 2006–07 Torneo Argentino A by winning the playoff and General Paz Juniors was relegated to 2006–07 Torneo Argentino B.