A ventilated ridge for buildings, comprising a perforated sheet support to be fixed to the top of two pitches of the roofing of the building which are either inclined or bent in opposite sense and a ridge cap to be constrained to said support, and which comprises: - a plurality of brackets to be applied at predetermined distances to said roofing, each bracket comprising a central portion and two end portions, which can be shaped with respect to said central portion according to the pattern of said pitches of the roofing, - constraining means of said brackets to said roofing, - a perforated support, which can be constrained to said brackets, previously constrained to said roofing, and comprising a substantially U-shaped portion and folded side portions, said folded side portions comprising: - first bands, which run from the respective upper ends of the side wings of the U-shaped element and which develop downwards, - second bands, which run from the respective ends of the first bands and which develop outwards with respect to said first bands, - constraining means of the central wing of said U-shaped portion of said perforated support to the central portion of each of said brackets, - a ridge cap comprising a central band for resting on the side wings of said U-shaped portion of said perforated support and side bands with the free edge folded to couple on site the corresponding free outer edge of the folded side portions of said support, characterized in that said folded side portions comprise third bands, which run from the respective ends of the second bands and which develop downwards with respect to said second bands, and in that said first bands of said support run externally and parallel with respect to the side wings of said support. - a plurality of brackets to be applied at predetermined distances to said roofing, each bracket comprising a central portion and two end portions, which can be shaped with respect to said central portion according to the pattern of said pitches of the roofing, - constraining means of said brackets to said roofing, - a perforated support, which can be constrained to said brackets, previously constrained to said roofing, and comprising a substantially U-shaped portion and folded side portions, said folded side portions comprising: - first bands, which run from the respective upper ends of the side wings of the U-shaped element and which develop downwards, - second bands, which run from the respective ends of the first bands and which develop outwards with respect to said first bands, - first bands, which run from the respective upper ends of the side wings of the U-shaped element and which develop downwards, - second bands, which run from the respective ends of the first bands and which develop outwards with respect to said first bands, - constraining means of the central wing of said U-shaped portion of said perforated support to the central portion of each of said brackets, - a ridge cap comprising a central band for resting on the side wings of said U-shaped portion of said perforated support and side bands with the free edge folded to couple on site the corresponding free outer edge of the folded side portions of said support,