Abstract: Device for cutting loose a bacon- and/or fat layer from meat, consisting of a frame having a transportation surface for the meat to be processed and in which transportation surface a gripping roll has been arranged or to which transportation surface a gripping roll adjoins, by means of which the meat may be drawn against and past a cutting knife mounted near the gripping roll the height of the cutting knife being continuously adjustable under the control of an ultrasonic sensing device which detects the position of the separating plane between the meat and the bacon- or fat layer.