The 2009 Categoría Primera B season, officially known as the 2009 Copa Premier season for sponsorship reasons) was the 20th season since its founding as Colombia's second division football league.
As the second worst team in the 2009 Categoría Primera A relegation table, Deportivo Pereira had to play a two-legged tie against Atlético Bucaramanga, the Primera B runners-up. As the Primera A team, Deportivo Pereira 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.