Teemu Mäntysaari (born 7 January 1987) is a Finnish guitarist.
He is known for playing for metal bands Wintersun, Imperanon, Induction, Smackbound, and Megadeth.
2004
In 2004, he joined the band Wintersun and has toured with them since then.
2007
He also played for Imperanon until their break-up in 2007.
He has written many unreleased songs with Imperanon.
2015
He has also played for Smackbound since 2015.
On 5 September 2023, Mäntysaari stepped in as the lead guitarist on Megadeth's North American tour as guitarist Kiko Loureiro tended to undisclosed family matters.
He was appointed on Loureiro's recommendation.
On 21 November 2023, Megadeth band leader Dave Mustaine released an official statement, announcing that the band is "going to move forward with Teemu Mäntysaari as the guitar player for Megadeth" while Loureiro stays on an indefinite hiatus.
This became permanent as Loureiro announced his departure from Megadeth in November 2023.
