Matti Pellonpää (28 March 1951 in Helsinki – 13 July 1995 in Vaasa) was a Finnish actor and a musician.

He started his career in 1962 as a radio actor at the Finnish state-owned broadcasting company YLE.

Peltsix's songs were composed by Pale Saarinen, Kari Makkonen and Jukka Haikonen.

Matti Pellonpää died of a heart attack on 13 July 1995 at the age of 44.

A Finnish documentary film Boheemi elää/Bohemian Eyes on Pellonpää's life was made in 2011 (directed by Janne Kuusi).