Fabrizio Galliari (1709–1790) was an Italian painter active in Northern Italy.

He was born in Andorno in the Piedmontese province of Biella, and died in Treviglio. He was part of a large family of artists, the second son of Giovanni, and brother of Bernardino Galliari. Fabrizio was a quadraturista. He painted in many churches and palaces. He painted the cupola of the Cathedral of Vercelli. In 1778, he became professor at the Albertina Academy. ^[1] Bernardino was the first son of Giovanni. ^[2]