Jean-Josaphat Gagnier (2 December 1885 – 16 September 1949) was a Canadian conductor, composer, clarinetist, bassoonist, pianist, arts administrator, and music educator.
His other clarinet teachers included Oscar Arnold, Léon Medaer, Louis van Loocke, and Jacques Vanpoucke.
Goulet's Montreal Symphony Orchestra, following the ensemble's unsuccessful attempt to acquire two bassoonists among the city's other musicians.
His work with this company led to his meeting arts patron and impresario Frank Stephen Meighen who was highly impressed by Gagnier's talent.
The music presented was the result of Gagnier's unearthing of original scores by Lavallée held in private collections and libraries.
For them he not only coordinated and chose programs, but also served as a conductor for broadcasts of opera, orchestral, and band concerts.
He also gave numerous guest lectures and published several articles, essays, and poems; many of which appeared in Le Passe-Temps.