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.
He painted in many churches and palaces.
He painted the cupola of the Cathedral of Vercelli.