An input device including an operation plane on which an operating body is operated, the operation plane having a first direction (Y1-Y2) and a second direction (X1-X2) intersecting with the first direction, the input device comprising: a plurality of first electrode arrays (L11 to L15) individually extending in the first direction (Y1-Y2) and arranged with intervals interposed between the first electrode arrays (L11 to L15); a plurality of second electrode arrays (L21 to L26) individually extending in the second direction (X1-X2) and arranged with intervals interposed between the second electrode arrays(L21 to L26); and a plurality of third electrode arrays (L31 to L36) individually extending in the second direction (X1-X2) and arranged with intervals interposed between the third electrode arrays (L31 to L36); wherein the plurality of third electrode arrays (L31 to L36) are arranged closer to the operation plane relative to the plurality of second electrode arrays (L21 to L26) in a normal direction of the operation plane, the second electrode arrays (L21 to L26) have respective portions protruding from the third electrode arrays (L31 to L36) corresponding to the second electrode arrays (L21 to L26), when viewed in the normal direction, and the input device further comprises: means for setting the plurality of first electrode arrays (L11 to L15) as driving electrodes while individually setting the plurality of second electrode arrays (L21 to L26) and the plurality of third electrode arrays (L31 to L36) as reception electrodes; means for setting the plurality of first electrode arrays (L11 to L15) as reception electrodes while individually setting the plurality of second electrode arrays (L21 to L26) and the plurality of third electrode arrays (L31 to L36) as driving electrodes, and means for calculating a position of the operating body in the normal direction relative to the operation plane based on a ratio ΔC1/ΔC2, wherein ΔC1 is a change amount of electrostatic capacitance between the plurality of first electrode arrays (L11 to L15) and the plurality of third electrode arrays (L31 to L36) occurred by an operation of the operating body, and wherein ΔC2 is a change amount of electrostatic capacitance between the plurality of first electrode arrays (L11 to L15) and the plurality of second electrode arrays (L21 to L26) occurred by an operation of the operating body. a plurality of first electrode arrays (L11 to L15) individually extending in the first direction (Y1-Y2) and arranged with intervals interposed between the first electrode arrays (L11 to L15); a plurality of second electrode arrays (L21 to L26) individually extending in the second direction (X1-X2) and arranged with intervals interposed between the second electrode arrays(L21 to L26); and a plurality of third electrode arrays (L31 to L36) individually extending in the second direction (X1-X2) and arranged with intervals interposed between the third electrode arrays (L31 to L36); wherein the plurality of third electrode arrays (L31 to L36) are arranged closer to the operation plane relative to the plurality of second electrode arrays (L21 to L26) in a normal direction of the operation plane, the second electrode arrays (L21 to L26) have respective portions protruding from the third electrode arrays (L31 to L36) corresponding to the second electrode arrays (L21 to L26), when viewed in the normal direction, and the input device further comprises: means for setting the plurality of first electrode arrays (L11 to L15) as driving electrodes while individually setting the plurality of second electrode arrays (L21 to L26) and the plurality of third electrode arrays (L31 to L36) as reception electrodes; means for setting the plurality of first electrode arrays (L11 to L15) as reception electrodes while individually setting the plurality of second electrode arrays (L21 to L26) and the plurality of third electrode arrays (L31 to L36) as driving electrodes, and means for calculating a position of the operating body in the normal direction relative to the operation plane based on a ratio ΔC1/ΔC2, wherein ΔC1 is a change amount of electrostatic capacitance between the plurality of first electrode arrays (L11 to L15) and the plurality of third electrode arrays (L31 to L36) occurred by an operation of the operating body, and wherein ΔC2 is a change amount of electrostatic capacitance between the plurality of first electrode arrays (L11 to L15) and the plurality of second electrode arrays (L21 to L26) occurred by an operation of the operating body. means for setting the plurality of first electrode arrays (L11 to L15) as driving electrodes while individually setting the plurality of second electrode arrays (L21 to L26) and the plurality of third electrode arrays (L31 to L36) as reception electrodes; means for setting the plurality of first electrode arrays (L11 to L15) as reception electrodes while individually setting the plurality of second electrode arrays (L21 to L26) and the plurality of third electrode arrays (L31 to L36) as driving electrodes, and means for calculating a position of the operating body in the normal direction relative to the operation plane based on a ratio ΔC1/ΔC2, wherein ΔC1 is a change amount of electrostatic capacitance between the plurality of first electrode arrays (L11 to L15) and the plurality of third electrode arrays (L31 to L36) occurred by an operation of the operating body, and wherein ΔC2 is a change amount of electrostatic capacitance between the plurality of first electrode arrays (L11 to L15) and the plurality of second electrode arrays (L21 to L26) occurred by an operation of the operating body.