| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Petter (Peter-) Marentius•Martinsen |
| Used name | Petter•Martinsen |
| Born | 14 May 1887 in Sarpsborg, Viken (NOR) |
| Died | 27 December 1972 (aged 85 years 7 months 13 days) in Sarpsborg, Viken (NOR) |
| Affiliations | Turn- og Idrettslaget National, Sarpsborg (NOR) |
| NOC |  Norway |
| Medals | OG |
| Gold | 1 |
| Silver | 0 |
| Bronze | 0 |
| Total | 1 |
Petter Martinsen was a member of the Norwegian men’s gymnastics team, which won an Olympic gold medal in the all-around free system event. His parents’ name was Kristiansen. He worked as a paper cutter in a paper mill. In 1914, he married Severine Henriette Severinsdatter Melleby. The couple had a son and a daughter.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1912 Summer Olympics | Artistic Gymnastics (Gymnastics) | NOR |
Petter Martinsen | |||
| Team, Men (Olympic) | Norway | 1 | Gold |
