A setting unit dynamically sets a first area and a second area on a touch sensor mounted on a grip portion that a driver grips on a steering wheel. A first detector is configured to detect a state where a first area in a touch sensor mounted on a grip portion that a driver grips on a steering wheel is touched. A second detector is configured to detect a state where a particular input operation is performed on a second area located on the upper side of the first area in the touch sensor. A controller is configured to control an operation target device to be operated with the touch sensor according to the particular input operation when the first detector detects the state where the first area is touched and the second detector detects the state where the particular input operation is performed.