1999–2000 Torneo Argentino A

The 1999–00 Argentine Torneo Argentino A was the fifth season of third division professional football in Argentina. A total of 16 teams competed; the champion was promoted to Primera B Nacional.

Relegation playoff

 * Huracán Corrientes remained in the Torneo Argentino A by winning the playoff and Estudiantes (RC) was relegated to 2000–01 Torneo Argentino B.