Abstract: Provided is an input assistance device that generates multiple signals without removal of a hand from a rotating body. This input assistance device 10 is equipped with: an operation unit having a shaft 2 that tilts in multiple directions from a neutral position and a rotating body 3 that rotates with respect to the shaft 2; a first sensor 5 that detects the tilt direction of the shaft 2; a second sensor 6 that detects the rotational angle of the rotating body 3; and a signal generation unit 9 that generates signals using the detection result from the first sensor 5 and the detection result from the second sensor 6. Multiple signals can be generated by means of the signal generation unit 9 by selecting the type of signal on the basis of the tilt direction of the shaft 2 as detected by the first sensor 5 and adjusting the size of the signal on the basis of the rotational angle of the rotating body 3 as detected by the second sensor 6.