To reduce the troublesomeness that the display is changed by any mistaken operation of a driver.

An input device 10 includes a first switch 12 to output the contact detection signal to a display control device when detecting that a key top 14 is operated by the operational force equal to or more than a first determination value, and a second switch 13 to output the operation detection signal to the display control device when detecting that the key top 14 is operated by the operational force thereabove. The display control device performs the display control corresponding to the operation of the key top 14 according to the operation detection signal on the condition that the predetermined transit time is elapsed after the contact detection signal is input, and this transit time is variably set according to the operational environment.