2005 ATP Buenos Aires – DoublesLucas Arnold and Mariano Hood were the defending champions, but lost in the semifinals this year.František Čermák and Leoš Friedl won the title, defeating José Acasuso and Sebastián Prieto 6–2, 7–5 in the final.Seeds Gastón Etlis / Martín Rodríguez ' Lucas Arnold / Mariano Hood ' František Čermák / Leoš Friedl Mariusz Fyrstenberg / Marcin Matkowski ''''