| Olympic medal record | ||
|---|---|---|
| Men's gymnastics | ||
Representing  Norway
| ||
 |
1912 Stockholm | Team, free system |
Petter Marentius Martinsen (14 May 1887 – 27 December 1972) was a Norwegian gymnast who competed in the 1912 Summer Olympics. He was part of the Norwegian team, which won the gold medal in the gymnastics men's team, free system event.[1]
- ^ "Petter Martinsen". Olympedia. Retrieved 15 April 2021.