The 2015–16 National League B season was the 69th ice hockey season of Switzerland's second tier hockey league, the National League B. HC Ajoie went on to win the championship by defeating SC Rapperswil-Jona Lakers in the finals.
This title is the team's second in its history since 1992 when they won their first National League B championship.
The regular season started on September 11, 2015 and ended on February 13, 2016.
The playoffs started on February 16, 2016 and ended on April 1, 2016.
[2] In League Qualification series HC Ajoie were supposed to play against EHC Biel, but the series were cancelled after HC Ajoie have not handed in their application for a promotion to next year's NLA season.