Kari Tiainen (born 26 August 1966 in Riihimäki) is a Finnish former professional enduro rider. He competed in the World Enduro Championships from 1989 to 2003. Tiainen is notable for being a seven-time World Enduro Champion and held the record for most wins in the world championship (77), until the record was broken by compatriot Juha Salminen during the 2008 season. In 2012, Tiainen was named an FIM Legend for his motorcycling achievements.