A capacitive sensor including a substrate, detection and drive electrodes, and a controller. The substrate includes one or a plurality of insulating layers including first and second faces. The detection electrode includes mutually electrically connected detection lines arrayed at spaced intervals on the first face. The drive electrode includes mutually electrically connected drive lines each arranged on the first or second face and located between adjacent two of the detection lines. When a target approaches the detection electrode being charged and discharged by the controller, the approach causes a change in a first capacitance between the detection electrode and the target. When a target approaches the detection and drive electrodes while the controller is supplying drive pulses to the drive electrode, the approach causes a change in a second capacitance between the detection electrode and the drive electrode. The controller detects the target referring to changes in the first and second capacitances.