Jussi Sydänmaa (born 26 June 1972) is a Finnish guitarist and a former founding member of the rock band Lordi, performing by the stage name of Amen until his departure in May 2022. He graduated as an Information Technology engineer in 2001 and had been making the website of Lordi. Sydänmaa plays Schechter guitars (specifically the Solo II Custom and the Hellraiser Solo II). The municipality of Mäntsälä granted Sydänmaa with a statue named "Hard Rock Stone" on 26 June 2006.