Martti Juhani Suosalo (born 19 July 1962) is a Finnish actor and singer.

Suosalo was born in Oulu, and began his career in 1986 with an appearance in a TV series.

While most of his work has been in television, in 1999, Suosalo appeared in just about every major film produced in Finland that year, appearing on the big screen in films such as Rentun ruusu, Sibelius and Lapin kullan kimallus.

[1] He reprises his role as Ahti for the 2023 video game Alan Wake II.

At the 2020 Vienna Independent Film Festival, Suosalo received the Best Actor award for his role in Laugh or Die [fi] (Suomen hauskin mies).