The 2004 Categoría Primera B season, (officially known as the 2004 Copa Premier for sponsorship reasons) was the 15th season of Colombia's second division football league. Real Cartagena won the tournament for the second time and was promoted to the Categoría Primera A. Blas Pérez, playing for Centauros Villavicencio, was the topscorer with 29 goals.[1][2]
18 teams take part in the season. The previous season's champions Bogotá Chicó was promoted to Primera A for the 2004 season. Centauros Villavicencio were relegated from Primera A at the end of the 2003 season after finishing in the bottom of the top tier's relegation table. Dimerco Popayán and El Cóndor did not take part of the tournament. Chía Fair Play is renamed as Chía and Itagüí is renamed back as Deportivo Antioquia. Bajo Cauca, Bogotá and Valledupar were the debuting teams for this season.