OCCUPANT PROTECTION DEVICE FOR VEHICLE

An occupant protection device for a vehicle including a seat on which an occupant is seated includes: a push up mechanism configured to push up an outer side part of a seat surface of the seat, in a vehicle width direction, relative to an inner side part of the seat surface; a pushing mechanism configured to push at least a shoulder of the occupant seated on the seat from an outer side toward an inner side in the vehicle width direction; an in-vehicle sensor configured to detect side collision to be made on the vehicle or a risk of the side collision to be made on the vehicle; and a controller configured to operate both the push up mechanism and the pushing mechanism when the in-vehicle sensor detects the side collision to be made on the vehicle or the risk of the side collision to be made on the vehicle.