The 2009–10 2. Fußball-Bundesliga was the 36th season of the 2. Fußball-Bundesliga, the second tier of Germany's football league. The season began on 7 August 2009 and ended on 9 May 2010. A winter break was held between 21 December 2009 and 14 January 2010, though the period has been reduced from six to three weeks.