A method for cutting a glass sheet according to a glass cutting programme comprising a plurality of first cutting lines parallel to each other in order to form a plurality of crossbeams and, for at least part of said crossbeams, a plurality of second cutting lines of the respective crossbeams for forming flat articles, the method being implemented by using a cutting machine comprising, along a longitudinal feeding direction of the glass to be cut: a front supporting surface; a rear supporting surface; a cutting bridge arranged between the front and rear supporting surfaces and comprising cutting means slidable along a cutting path orthogonal to said feeding direction; handling means for moving at least the glass sheet and the respective crossbeams over said front and rear supporting surfaces; and lifting means for moving parts of the glass sheet both from and towards said rear supporting surface; the method comprising the steps of arranging the glass sheet to be cut on the rear supporting surface, feeding it in the longitudinal direction under the cutting bridge, positioning and cutting it along a first intermediate cutting line making a piece of front glass sheet arranged on the front supporting surface and still to be cut along respective first cutting lines and a piece of rear glass sheet arranged on the rear supporting surface and moving the rear piece backwards by spacing it from the cutting bridge, characterised in that it comprises the further step of lifting the piece of rear glass sheet from said rear supporting surface, moving the front piece towards the cutting bridge and cutting the front piece progressively along the respective said first cutting lines forming crossbeams in succession and cutting the last crossbeam formed along the respective said second cutting lines after having moved at least part of the other crossbeams formed below said lifted rear piece. a front supporting surface; a rear supporting surface; a cutting bridge arranged between the front and rear supporting surfaces and comprising cutting means slidable along a cutting path orthogonal to said feeding direction; handling means for moving at least the glass sheet and the respective crossbeams over said front and rear supporting surfaces; and lifting means for moving parts of the glass sheet both from and towards said rear supporting surface; the method comprising the steps of arranging the glass sheet to be cut on the rear supporting surface, feeding it in the longitudinal direction under the cutting bridge, positioning and cutting it along a first intermediate cutting line making a piece of front glass sheet arranged on the front supporting surface and still to be cut along respective first cutting lines and a piece of rear glass sheet arranged on the rear supporting surface and moving the rear piece backwards by spacing it from the cutting bridge, characterised in that it comprises the further step of lifting the piece of rear glass sheet from said rear supporting surface, moving the front piece towards the cutting bridge and cutting the front piece progressively along the respective said first cutting lines forming crossbeams in succession and cutting the last crossbeam formed along the respective said second cutting lines after having moved at least part of the other crossbeams formed below said lifted rear piece.