Petri Tapio Mattson (born 1973 in Haapajärvi) is a Finnish violinist and ensemble director specialized in Early music, and a violin maker.
His teachers included Grazyna Gebert (modern violin), Kreeta-Maria Kentala, Jaap Schröder (Baroque violin), Timo Juntura (viol, chamber music), Rabbe Forsman and Kati Hämäläinen (Early music ensemble performance and performing practices).
Between 1998 and 1996 he has also attended master classes given by Gottfried Schneider, David Kim, Zoria Shikmurzajeva (modern violin), Sigiswald Kuijken, Charles Toet and Konrad Hünteler (Early music ensemble performance).
Petri Tapio Mattson is the founder of the Early music ensemble Opus X, and has worked as its artistic director from 1995 to 2006 and again from 2009 onwards.
He has recorded for the labels Alba, BIS, Ondine, Fuga, Naxos, Aeolus and La Bottega Discantica.