Input apparatus, electronic device and sensor sheet

There is provided an input apparatus including a deformable sheet-like operational member having a plurality of key areas; an electrode substrate having a plurality of first electrode lines and a plurality of second electrode lines disposed facing to a plurality of the first electrode lines and crossing with a plurality of the first electrode lines, being capable of electrostatically detecting a change in a distance to each of a plurality of the key areas; and a support having a plurality of structures connecting the electrode substrate and the operational member, first spaces formed between a plurality of the structures corresponding to each of a plurality of the key areas, and second spaces formed between a plurality of the structures common to a predetermined plurality of the key areas.