Engineer Giovanni Cali, arrived back in Italy on Friday at Rome's Fiumicino airport after being held hostage for 22 days in Haiti, the foreign ministry said in a statement.
The 74-year-old from Catania thanked the foreign ministry staff from its crisis unit and Italy's intelligence for their work in obtaining his release.
He plans to travel on to his native Sicily to see his family.
Cali, an employee of a Rome-based engineering firm, was seized on 1 June at a building site in Haiti's capital Port-au-Prince by a criminal gang, who reportedly demanded a ransom.
At the time of his abduction, Cali was working on the construction of a key highway linking the centre of Haiti to the north of the impoverished island.