2003–04 Torneo Argentino A

The 2003–04 Argentine Torneo Argentino A was the ninth season of third division professional football in Argentina. A total of 20 teams competed; the champion was promoted to Primera B Nacional.

First stage
In every round the bye team played against the bye team of the other zone: Team from Zone A vs Team from Zone B and Team from Zone C vs Team from Zone D.

Final stage

 * Note: The team in the first line plays at home the second leg.

First stage
In every round the bye team played against the bye team of the other zone: Team from Zone A vs Team from Zone B and Team from Zone C vs Team from Zone D.

Final stage

 * Note: The team in the first line plays at home the second leg.

Promotion/relegation playoff B Nacional-Torneo Argentino A

 * CAI remained in the Torneo Argentino A after a 1-1 aggregate tie by virtue of a "sports advantage". In case of a tie in goals, the team from the Torneo Argentino A gets to stay in it.

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

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


 * Rosario Puerto Belgrano was promoted to 2004–05 Torneo Argentino A by winning the playoff and Racing (O) was relegated to 2004–05 Torneo Argentino B.
 * Gimnasia y Tiro remained in the Torneo Argentino A by winning the playoff.