A map display controller includes an operation portion that is operated in a predetermined operation range, an operation detecting unit that detects an operation on the operation portion, a reaction force generating unit that applies a reaction force against a change in position of the operation portion to the operation portion when an operation in which the position of the operation portion is changed to pass over a predetermined area in the operation range in a predetermined direction is performed, and a control unit that switches a display mode of a map display displayed on a display device when it is detected from the detection result of the operation detecting unit that the position of the operation portion passes over the predetermined area in the predetermined direction.