A passenger wake-up apparatus for use in a vehicle includes a detector configured to detect a state of a passenger and being capable of automated driving control or driving support control based on a result of detection by the detector. The passenger wake-up apparatus includes a rest on which the passenger can put a foot, and a driving unit configured to be able to move the rest. When determining that there is a decrease in a level of wakefulness of the passenger based on the result of the detection by the detector, the driving unit moves the rest to push the foot of the passenger, while the automated driving control or the driving support control of the vehicle is performed.