Tarjei Bø is a Norwegian professional biathlete. Awarded Olympic gold medals, World Championship gold medals and World Cup victories from 2010 to 2025. Bø debuted in the Biathlon World Cup on 26 March 2009 in Khanty-Mansiysk, Russia. In the 2010 Winter Olympics, he earned his first gold medal in the 4 × 7.5 km biathlon relay. On 10 December 2010 he won the World Cup sprint race in Hochfilzen, his first world cup victory. He also won the following pursuit race and anchored the winning relay team.
Bø is the older brother of biathlete Johannes Thingnes Bø.
Tarjei won the 2010 to 2011 biathlon crystal globe for having the most points overall in the season. He finished five points ahead of his teammate Emil Hegle Svendsen.