The invention relates to a moment-and-force sensor comprising a one-piece main part that forms a frame enclosing a central opening and defining two securing planes which are offset with respect to one another. On each securing plane at least three securing points or surfaces are provided, on corresponding securing sections of the frame, and are arranged alternately in one of the two securing planes, in the circumferential frame direction. The frame changes in thickness between said securing sections, from one securing plane to the other, and comprises transition sections which extend at an incline to said securing planes, interconnect the securing sections of the frame, and each of which has measurement sensors arranged therein in order to detect material extension of the frame.