An input operation device with a capacitive sensor , comprising: a touch sensor part that includes an operation surface on which an input operation is performed, and a detection part of the capacitive sensor ; a detection value changing part that is arranged on a back surface side opposite to the operation surface of the touch sensor part and that changes a detection value of the capacitive sensor depending on approaching or contact of the detection part ; and a supporting part that supports the touch sensor part in a state in which the detection value changing part and the touch sensor part are separated from each other, wherein: the touch sensor part has a sheet shape, the supporting part is provided with the detection value changing part , the supporting part includes an elastically shape-changeable part that elastically changes shape so as to bring the detection part closer to or into contact with the detection value changing part in response to pressing of the operation surface and a pressing force receiving part which is attached at a position not overlapping the detection part of the touch sensor part in plan view and which receives pressing force applied from the touch sensor part , and the capacitive sensor generates a first detection value indicating a first operation of touching the operation surface and a second detection value indicating a second operation of pressing the operation surface toward the detection value changing part . a touch sensor part that includes an operation surface on which an input operation is performed, and a detection part of the capacitive sensor ; a detection value changing part that is arranged on a back surface side opposite to the operation surface of the touch sensor part and that changes a detection value of the capacitive sensor depending on approaching or contact of the detection part ; and a supporting part that supports the touch sensor part in a state in which the detection value changing part and the touch sensor part are separated from each other, wherein: the touch sensor part has a sheet shape, the supporting part is provided with the detection value changing part , the supporting part includes an elastically shape-changeable part that elastically changes shape so as to bring the detection part closer to or into contact with the detection value changing part in response to pressing of the operation surface and a pressing force receiving part which is attached at a position not overlapping the detection part of the touch sensor part in plan view and which receives pressing force applied from the touch sensor part , and the capacitive sensor generates a first detection value indicating a first operation of touching the operation surface and a second detection value indicating a second operation of pressing the operation surface toward the detection value changing part . the touch sensor part has a sheet shape, the supporting part is provided with the detection value changing part , the supporting part includes an elastically shape-changeable part that elastically changes shape so as to bring the detection part closer to or into contact with the detection value changing part in response to pressing of the operation surface and a pressing force receiving part which is attached at a position not overlapping the detection part of the touch sensor part in plan view and which receives pressing force applied from the touch sensor part , and the capacitive sensor generates a first detection value indicating a first operation of touching the operation surface and a second detection value indicating a second operation of pressing the operation surface toward the detection value changing part . <EOS>