Abstract: A device for feeding streams of tobacco on to a cigarette manufacturing machine, which device presents an up-flow input duct, two up-flow output channels connected to the top end of the input duct via a chamber, and a device for dividing the input tobacco stream flowing up duct into two output streams, and feeding each to a respective up-flow channel; the separating device being located in the vicinity of chamber and featuring two conveyors, each located between the top end of input duct and the bottom end of a respective output channel; both conveyors presenting tobacco transporting means moving in the same direction and at substantially the same speed as the tobacco stream flowing up input duct.