Giuseppe Maria Jacchini (16 July 1667 in Bologna – 2 May 1727) was an Italian cellist and composer.
Jacchini received his musical training as a choirboy in the San Petronio Basilica in Bologna. There he studied composition with
Giacomo Antonio Perti and
Domenico Gabrielli. Later Jacchini became a cellist in the "cappella musicale" of the San Petronio Basilica. He is possibly the "Giosefo del Violonzino" referred to in the period from 1680 to 1688.
He composed mainly instrumental music with cello, violin, and keyboard continuo. He dedicated his opus 4 to Bolognese Count and composer
Pirro Albergati, who had campaigned for Jacchini's permanent position in the orchestra of the cathedral of Bologna.
Jacchini became a member of the prestigious "Accademia Filarmonica" on 16 December 1688. He also served as conductor of the "Collegio dei Nobili" and the church of S. Luigi.