| Roar Flåthen | |
| Office: | Leader of the Norwegian Confederation of Trade Unions |
| Term Start: | 17 April 2007 |
| Term End: | 6 May 2013 |
| Predecessor: | Gerd-Liv Valla |
| Successor: | Gerd Kristiansen |
| Office2: | Deputy Member of the Norwegian Parliament |
| Term Start2: | 1 October 1985 |
| Term End2: | 30 September 1989 |
| Constituency2: | Buskerud |
| Birth Date: | 15 January 1950 |
| Birth Place: | Buskerud, Norway |
| Nationality: | Norwegian |
| Party: | Labour |
| Occupation: | Politician |
Roar Flåthen (born 15 January 1950) is a Norwegian trade unionist and politician for the Norwegian Labour Party.
He was leader of the Norwegian Confederation of Trade Unions 2007 - 2013. He became the leader after Gerd-Liv Valla resigned on 9 March 2007 in the aftermath of the Valla scandal.
He has also represented the trade union in the National Wages Board,[1] before becoming the trade union's leader.
As a politician he served as a deputy representative to the Parliament of Norway from Buskerud during the term 1985 - 1989.
As of 2014 he is a board member of Kongsberg Gruppen.