The 2008 Categoría Primera B season, officially known as the 2008 Copa Premier season for sponsorship reasons) was the 19th season since its founding as Colombia's second division football league.
Teams
Team in italics replaced Bajo Cauca for the Torneo Finalización.
Torneo Apertura
First stage
Group A
Group B
Semifinals
Group A
Group B
Finals
Deportivo Rionegro won 4–0 on aggregate.
Torneo Finalización
First stage
Group A
Group B
Semifinals
Group A
Group B
Finals
Real Cartagena won 3–2 on aggregate.
Championship final
Real Cartagena won 4–2 on aggregate.
Promotion/relegation playoff
As the second worst team in the 2008 Categoría Primera A relegation table, Envigado had to play a two-legged tie against Deportivo Rionegro, the Primera B runner-up. As the Primera A team, Envigado played the second leg at home. The winner competed in the Primera A for the 2009 season, while the loser competed in the Primera B.