Bag for punches, kicks and boxing, provided with spine, for suspension, consisting of a part of containment, preferably cylindrical, provided throughout its central vertical axis, of a cylinders assembly, made of concrete, having also different dimensions and specific weights, separated from each other, by expanded polyurethane agglomerated disks, wherein, both of said cylinders and disks, are also centrally perforated, to allow the passage inside them, of a chain or of a cable, both of metal, in order to assemble said cylinders and disks, in a vertically layered manner, as a spine, coated by a layer of expanded polyurethane agglomerate foam, obtained by means of a hollow cylinder and, alternatively, by a sheet layer wrapped around the said spine, in the manner of the spine of a human being, wrapped in connective tissue and muscles, to simulate the areas of the head, neck, chest and abdomen of the opponent.