The 2005–06 Nationalliga A season was the 68th regular season of the Nationalliga A, the main professional ice hockey league in Switzerland.
The season started on September 9, 2005, and the last league qualification game was played on April 17, 2006.
Regular season
Final standings
Scoring leaders
Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty Minutes
Playoffs
Tournament Bracket
Quarterfinals Results
Semifinals Results
Finals Results
Scoring leaders
Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty Minutes