Knut Knutsson Steintjønndalen (22 November 1887 – 11 June 1969) was a Norwegian Hardanger fiddle maker from Bø in Telemark, Norway.
Before he died, Knut Eilevsson Steintjønndalen told his 15-year-old son Knut Knutsson to keep the tradition alive.
Knut made his first Hardanger fiddle at age 15 and was paid approximately $1.50.
61 years later, in 1963, he was paid about $200.
It took him about one month to complete one violin, and he produced about 800–900 fiddles during his life.
He worked every weekday from 7 a.m.