An input device inputting information corresponding to an approach of an object with respect to an operation surface, comprising: a number n of electrodes (11, E1-E5) arranged on the operation surface so that at least one of the electrodes (11, E1-E5) has an overlapping portion with a part of a number m of segments (A1-A6), the segments (A1-A6) being obtained by dividing the operation surface, n being a natural number smaller than m; a capacitance detection part outputting a number n of detection data corresponding to first capacitances formed between the object approaching the operation surface and the number n of electrodes (11, E1-E5); and an element data configuration part configuring element data corresponding to a third capacitance for each of the number m of segments (A1-A6), the third capacitance being obtained by summing second capacitances, each of the second capacitances being formed between the overlapping portion of at least one of the electrodes located in one of the segments (A1-A6) and the object, wherein each of the number n of electrodes (11, E1-E5) has an overlapping portion in a different combination of the segments (A1-A6) from that of the other electrodes, or has a different area of the overlapping portion included in the same segment from that of the other electrodes, and wherein the element data configuration part configures a number m of the element data corresponding to the number m of segments (A1-A6) on the basis of predetermined information relating to an area ratio of the overlapping portion of individual one of the electrodes to all the overlapping portions located in the same segment in each of the number m of segments (A1-A6), and the number n of detection data output from the capacitance detection part. a number n of electrodes (11, E1-E5) arranged on the operation surface so that at least one of the electrodes (11, E1-E5) has an overlapping portion with a part of a number m of segments (A1-A6), the segments (A1-A6) being obtained by dividing the operation surface, n being a natural number smaller than m; a capacitance detection part outputting a number n of detection data corresponding to first capacitances formed between the object approaching the operation surface and the number n of electrodes (11, E1-E5); and an element data configuration part configuring element data corresponding to a third capacitance for each of the number m of segments (A1-A6), the third capacitance being obtained by summing second capacitances, each of the second capacitances being formed between the overlapping portion of at least one of the electrodes located in one of the segments (A1-A6) and the object, wherein each of the number n of electrodes (11, E1-E5) has an overlapping portion in a different combination of the segments (A1-A6) from that of the other electrodes, or has a different area of the overlapping portion included in the same segment from that of the other electrodes, and wherein the element data configuration part configures a number m of the element data corresponding to the number m of segments (A1-A6) on the basis of predetermined information relating to an area ratio of the overlapping portion of individual one of the electrodes to all the overlapping portions located in the same segment in each of the number m of segments (A1-A6), and the number n of detection data output from the capacitance detection part.