INPUT ASSISTANCE DEVICE AND INPUT SYSTEM

[Object] To provide an input assistance device with which an input can be accurately made through a necessary path when an input involving a continuous operation such as a rotational input is necessary and that can be detachably attached at an arbitrary position on a panel surface, and to provide an input system. [Solution] The input assistance device has a rotation support body having a central axis, an attachment mechanism that removably attaches the rotation support body to the panel surface of a sensor panel so that the central axis is along a direction perpendicular to the panel surface, and a rotational part supported by the rotation support body so as to be rotatable around the central axis; at least the side surface of the rotational part is formed from a conductive material, and conductive areas electrically connected to the side surface are allocated in part of a surface of the rotational part, the surface facing the panel surface.