A manufacturing machine for the production of disposable cartridges for electronic cigarettes; each disposable cartridge comprises a tubular casing, which contains a quantity of tobacco with, on top, a pad of filtering material; the manufacturing machine comprises: a manufacturing drum, which is mounted rotating in a stepwise manner around a first vertical rotation axis and supports at least one group of first seats, each adapted to receive a tubular casing; a first feeding unit, which feeds the corresponding tubular casings to the first seats of a group of first seats that is standing still in the area of the first feeding unit; a filling unit, which feeds a corresponding quantity of tobacco into each tubular casing carried by a first seat of a group that is standing still; and a second feeding unit, which feeds a corresponding pad of filtering material into each tubular casing carried by a first seat of a group that is standing still and comprises a supply device, which supplies a group of pieces of filtering material; the manufacturing machine is characterized in that the second feeding unit comprises: a cutting device comprising a single rotary blade which cyclically carries out a transverse cut of the group of pieces of filtering material so as to separate a single and only group of pads of filtering material which is formed by a number of pads of filtering material identical to the number of first seats of the same group; and a transfer device, which picks up the group of pads of filtering material immediately after the transverse cut and inserts the pads of filtering material into the corresponding first seats. a manufacturing drum, which is mounted rotating in a stepwise manner around a first vertical rotation axis and supports at least one group of first seats, each adapted to receive a tubular casing; a first feeding unit, which feeds the corresponding tubular casings to the first seats of a group of first seats that is standing still in the area of the first feeding unit; a filling unit, which feeds a corresponding quantity of tobacco into each tubular casing carried by a first seat of a group that is standing still; and a second feeding unit, which feeds a corresponding pad of filtering material into each tubular casing carried by a first seat of a group that is standing still and comprises a supply device, which supplies a group of pieces of filtering material; the manufacturing machine is characterized in that the second feeding unit comprises: a cutting device comprising a single rotary blade which cyclically carries out a transverse cut of the group of pieces of filtering material so as to separate a single and only group of pads of filtering material which is formed by a number of pads of filtering material identical to the number of first seats of the same group; and a transfer device, which picks up the group of pads of filtering material immediately after the transverse cut and inserts the pads of filtering material into the corresponding first seats. a cutting device comprising a single rotary blade which cyclically carries out a transverse cut of the group of pieces of filtering material so as to separate a single and only group of pads of filtering material which is formed by a number of pads of filtering material identical to the number of first seats of the same group; and a transfer device, which picks up the group of pads of filtering material immediately after the transverse cut and inserts the pads of filtering material into the corresponding first seats.