The 2009–10 HockeyAllsvenskan season was the fifth season of HockeyAllsvenskan, the second level of ice hockey in Sweden. 14 teams participated in the league, and the top four qualified for the Kvalserien, with the opportunity to be promoted to the Elitserien.
Teams ranked 4th through 7th met in a best-of-three elimination playoff, the winner of which would continue to the 2010 Elitserien qualifier ("Kvalserien"). This is the final season that this part of the tournament would be played as a playoff. The following seasons, teams ranked 4th through 7th instead competed in a double-round robin format.
In the first round, Almtuna and Malmö each beat their opponents (Mora and Bofors) by a 2–0 margin in games. Almtuna then beat Malmö 2–1 in games in the second round, to continue to the Elitserien qualifier.