Thor Kristian "Mr Frisk" Martinsen (born 12 July 1945) is a Norwegian ice hockey player who played for the Norwegian national ice hockey team.

[1] On 18 April 2009, he was appointed as honorary member of Frisk Tigers.

He also played 113 national team matches, including 4 Olympic Games and 13 World Championships.

He currently works in Frisk Tigers' junior sporting committee.

This Norwegian biographical article relating to ice hockey is a stub.