TRAVEL CONTROL DEVICE, VEHICLE, AND TRAVEL CONTROL METHOD

A travel control device whereby wasted energy consumption can be suppressed. The travel control device () has: a leading vehicle detection unit () that, once a leading vehicle that has been followed at no more than a set vehicle speed has gone, determines whether or not a new leading vehicle has been detected within a prescribed time; a speed determination unit () that, if a new leading vehicle has been detected, determines whether or not the speed difference between the speed of a host vehicle and the speed of the leading vehicle is within a set range having zero as the reference therefor; and a travel control unit () that, if the speed difference is within the set range, controls the host vehicle so as to prohibit acceleration for reducing the distance between the host vehicle and the new leading vehicle to a set inter-vehicle distance.