Harri Mäki studied the clarinet mainly with Reijo Koskinen in Finland. Having graduated from the class of Thomas Friedli at the Geneva Conservatory, he joined the Tapiola Sinfonietta. He also studied privately with Charles Neidich and Osmo Vänskä. He has premiered dozens of works, including clarinet concertos written for him by Juhani Nuorvala and Kirmo Lintinen.
He is the Professor of Woodwinds at the Sibelius Academy. Harri Mäki has performed in several festivals (in Barcelona, Granada, Lockenhaus, Moritzburg, Kuhmo, Beijing and Tokyo). In 2012, he received the Pro Musica award for his merits as a performer and a teacher.