Ski- og Fotballklubben Trygg was a sports club in Oslo, Norway, which played an important role for bandy in Norway and also was well known for its ice hockey section.
The ice hockey team was one of the founding members of the Hovedserien, the top level Norwegian league, for the 1934–35 season.
It won the Norwegian Bandy Premier League in 1921.
The club also consisted of a football department.
The club merged with Mercantile SFK in 1947.