The 2004–05 Argentine Primera División was the 114th season of top-flight football in Argentina.
The season ran from 15 August 2004 to 3 July 2005.
[1] Four teams promoted from Primera B Nacional, they were Instituto de Córdoba, Almagro (2003–04 Primera B Nacional champions and runners-up, respectively),[2][3][4] plus Argentinos Juniors and Huracán de Tres Arroyos (which had won the promotion playoff the previous year).
[5] Newell's Old Boys won the Apertura (5th league title) and Vélez Sársfield won the Clausura (6th title) championships, while Huracán de Tres Arroyos and Almagro were relegated.
* Winner of the series; teams currently playing in Primera División are listed first Argentinos Juniors and Huracán remained in Primera División