The present invention relates to a belt conveyor with a weighing device for a dough line, comprising a conveyor device, comprising a frame, at least two rollers supported by the frame, a conveyor belt, arranged movable in a length direction of the belt around the at least two rollers and a slot, extending in a width direction of the conveyor belt, and arranged adjacent to an inwardly facing part of the conveyor belt, and a weighing device, comprising a housing fitting the slot; and being movable into and removable from the slot at least one weighing unit, carried by the housing and arranged with a weighing surface thereof facing outwardly for weighing a weight exercised on the weighing surface.