2005 Campeonato Argentino de Rugby

Campeonato
New formula: 8 eight teams divided in two pools. The first two of each pool admitted to semifinals. The fourth teams to a play-out to avoid relegation.

Play Out

 * Noreste relegated (lost on aggregate 30-55)

Ascenso
Sixteen team divided in 4 pools. The first two of each pool to play-offs

Playoffs

 * Santa Fé promoted to "Campeonato"