Abstract: Metal binding wire twisting device.Two clamps (17, 18) are disposed to clamp and retain the wire in the groove in a wire guide (19) close to the rotating head (1) which is associated with an abutment member (12) which stops feeding of the wire and cutting means (13) and has a central recess (4) open in the direction towards the object (S) to be bound and into which open inclined radial passages (2, 3) for the wire, the ends of which are twisted by rotation of the head (1) to form a twist whose configuration is imposed by the internal configuration of the central recess (4).