The 2004–05 PBA season was the 30th season of the Philippine Basketball Association. Instead of the usual calendar year of February–December, the league changed its schedule to the current October–July format, while limiting the number of conferences from three to two. As part of the new league format, the season was preceded with a transition conference known as the 2004 PBA Fiesta Conference.

The Alaska Aces were a professional basketball team in the Philippine Basketball Association since 1986 under the ownership of Alaska Milk Corporation (AMC) and the owner of 14 PBA championships, tied with the Magnolia Hotshots for the third-most titles overall. They are one of the most popular teams in the league and the Philippines.