A description is given of a nail (1) for footwear, suitable for joining turned flaps of an upper (11) to an insole (21) of a footwear item, comprising a flat cylindrical head (5), a shank (7) and a tip (9) with section tapering from the shank (7) to a penetration tip, wherein the total length of the nail (1) is comprised between 6 and 12 mm and said tip (9) is provided with two cutting edges (91, 93) and two rounded lateral surfaces (92, 94) extending between said cutting edges (91, 93), the cross section of said tip (9) having a substantially oval shape with two sharp edges at the cutting edges (91, 93) and symmetrical with respect to the plane passing through said cutting edges (91, 93).