Controller and control method for improving operability at a time when a brake force that is retained in hill-hold control is reduced. A control section for executing the hill-hold control that retains the brake force on an inclined road surface is provided. The control section cancels retention of the brake force in the case where it is determined on the basis of a detection signal of a first detection mechanism that a first operation section for operating a brake mechanism is operated when the brake force is retained in the hill-hold control.