The 2011-2012 National League B Season was played from September 9, 2011 to February 7, 2012. The regular season was won by Lausanne HC with 105 points, 15 points ahead of the second place team, SC Langenthal. The playoffs were played from February 12 to March 27, 2012, with SC Langenthal defeating Lausanee HC to become Swiss Champions of NLB. Langenthal would later play HC Ambrì-Piotta in the league qualification series. Since Ambrì-Piotta would defeat Langenthal in the series, there was no changes to the NLA or NLB teams for the 2012-2013 seasons.