Juhamatti Tapio Aaltonen (born 4 June 1985) is a Finnish professional ice hockey winger, who currently plays for BK Mladá Boleslav of the Czech Extraliga.

Aaltonen started his professional career with Oulun Kärpät, playing with the team from 2002 to 2009 winning Finnish championship twice.

This option in his contract was exercised on 15 June 2010, when he was loaned from the Pelicans to Russian club, Metallurg Magnitogorsk of the KHL.

[1] Aaltonen was an integral part of Metallurg's offense in his two seasons in the KHL before he opted to sign with Swedish club, Rögle BK of the then Elitserien on 15 October 2012.

After the 2022–23 SHL season he left Scandinavia for a new experience and joined BK Mladá Boleslav playing the Czech Extraliga.