See main article: 2005 Copa Petrobras Santiago. Enzo Artoni and Ignacio González King were the defending champions, but did not compete this year.
Daniel Köllerer and Oliver Marach defeated Lucas Arnold Ker and Giovanni Lapentti 6–4, 6–3 in the final.
See also: 1. 
Lucas Arnold Ker / 
Giovanni Lapentti (final)
See also: 2. 
Rubén Ramírez Hidalgo / Santiago Ventura (first round)
See also: 3. 
Marcelo Melo / Sergio Roitman (quarterfinals)
See also: 4. Marcos Daniel / Fernando Vicente (withdrew due to a back injury for Daniel)