He was a Finnish comic-actor best known for his many performances in movies and television shows by Spede Pasanen.
Salminen, Vesa-Matti Loiri and Pasanen himself are the three important players in almost all of Pasanen’s productions.
Salminen frequently played a supporting or at the very least a relevant secondary character in many of Pasanen’s films, usually the bungling assistant to the main character (often portrayed by Pasanen).
His characters were frequently also called “Simo” (such as in Pähkähullu Suomi, Koeputkiaikuinen ja Simon enkelit).
Salminen is best remembered for the role of the luckless mechanic Sörselsson, working at an auto-repair shop with the foul-mouthed Härski Hartikainen (Pasanen) in the Uuno Turhapuro film series.
Prior to becoming one of Pasanen’s regular actors he was the Clown Water-jump champion of Finland.