OCCUPANT RESTRAINT DEVICE

An occupant restraint device is configured to restrain an occupant seated in a seat of a vehicle. The occupant restraint device includes a seat belt unit and a seat belt controller. The seat belt unit is configured to perform a restraint of the occupant by actuating a motor and winding a webbing. The seat belt controller is configured to control the seat belt unit to suit a drive mode of the vehicle. The seat belt controller is configured to, when the drive mode of the vehicle is switched to a rough road mode suitable for driving on a rough road or a sports mode suitable for sports driving, control the seat belt unit to perform the restraint of the occupant.