Torstein Træen (born 16 July 1995) is a Norwegian racing cyclist, who currently rides for UCI WorldTeam Team Bahrain Victorious.

He competed in the men's team time trial event at the 2017 UCI Road World Championships.

However, soon after the race, he was found to have testicular cancer, detected in a doping control test which revealed the presence of hCG in his blood.

In 2023, he competed in his first Tour de France following an 8th place finish at the Critérium du Dauphiné.

[8] In June, he took his first pro win on stage four of the Tour de Suisse in a solo victory.