Abstract: A force sensor includes: a dielectric elastic base material; and a first electrode and three second electrodes that sandwich the elastic base material from both sides in a thickness direction. In a plan view seen along the thickness direction, the three second electrodes are arranged to overlap portions of the first electrode that are different from one another. In each case where an external force acts on the elastic base material along each of a first direction and a second direction that form a predetermined angle on a plane orthogonal to the thickness direction, among areas of the portions where each of the three second electrodes overlaps the first electrode, the areas corresponding to at least two of the second electrodes change.