A capacitive sensor for detecting a change in electrostatic capacitance caused by a change in position of an object in each of a plurality of sections that divide a region to which the object is approachable, comprising: a plurality of detection electrodes each including a plurality of partial electrodes connected in cascade via wiring; a first layer in which the partial electrodes and the wiring are disposed; and a second layer in which the wiring is disposed, wherein each of the plurality of detection electrodes belongs to any one of three or more detection electrode groups, the detection electrodes that belong to a same one of the detection electrode groups among the plurality of detection electrodes do not intersect one another, the detection electrodes that belong to different ones of the detection electrode groups among the plurality of detection electrodes intersect one another while being in the first layer and the second layer, respectively, three or more partial electrodes included in three or more different ones of the detection electrodes, respectively, belonging to different ones of the detection electrode groups, are located in each of the plurality of sections, the three or more detection electrodes belonging to the different ones of the detection electrode groups intersect one another in an inner section of the sections, the inner section being surrounded by other sections, the three or more partial electrodes located in the inner section include a single first partial electrode and at least two second partial electrodes (BA11, BC11), the first partial electrode is connected in cascade to a first partial electrode of an adjacent second section on one side via the wiring passing through the first layer or the second layer and is connected in cascade to another first partial electrode of an adjacent third section on another side via the wiring passing through the second layer, and one of the at least two second partial electrodes is connected in cascade to a second partial electrode of an adjacent fourth section on one side via the wiring passing through the first layer and is connected in cascade to another second partial electrode of an adjacent fifth section on another side via the wiring passing through the second layer; and another one of the at least two second partial electrodes is connected in cascade to a second partial electrode of an adjacent sixth section on one side via the wiring passing through the first layer and is connected in cascade to another second partial electrode of a seventh section on the other side via the wiring passing through the second layer. a plurality of detection electrodes each including a plurality of partial electrodes connected in cascade via wiring; a first layer in which the partial electrodes and the wiring are disposed; and a second layer in which the wiring is disposed, wherein each of the plurality of detection electrodes belongs to any one of three or more detection electrode groups, the detection electrodes that belong to a same one of the detection electrode groups among the plurality of detection electrodes do not intersect one another, the detection electrodes that belong to different ones of the detection electrode groups among the plurality of detection electrodes intersect one another while being in the first layer and the second layer, respectively, three or more partial electrodes included in three or more different ones of the detection electrodes, respectively, belonging to different ones of the detection electrode groups, are located in each of the plurality of sections, the three or more detection electrodes belonging to the different ones of the detection electrode groups intersect one another in an inner section of the sections, the inner section being surrounded by other sections, the three or more partial electrodes located in the inner section include a single first partial electrode and at least two second partial electrodes (BA11, BC11), the first partial electrode is connected in cascade to a first partial electrode of an adjacent second section on one side via the wiring passing through the first layer or the second layer and is connected in cascade to another first partial electrode of an adjacent third section on another side via the wiring passing through the second layer, and one of the at least two second partial electrodes is connected in cascade to a second partial electrode of an adjacent fourth section on one side via the wiring passing through the first layer and is connected in cascade to another second partial electrode of an adjacent fifth section on another side via the wiring passing through the second layer; and another one of the at least two second partial electrodes is connected in cascade to a second partial electrode of an adjacent sixth section on one side via the wiring passing through the first layer and is connected in cascade to another second partial electrode of a seventh section on the other side via the wiring passing through the second layer.