Occupant restraint system for vehicle

An occupant restraint system for a vehicle, the occupant restraint system comprising:

• a seat belt device configured to restrain an occupant seated on a vehicular seat with a webbing, in which a first end of the webbing is wound around a winding device and a second end is fixed to one of the vehicular seat and a vehicle body, and the seat belt device configured such that a motor provided in the winding device is driven to wind the webbing;
• and
• an electronic control unit configured to:
• drive the motor such that a prescribed amount of the webbing is wound, when a first condition is satisfied, the first condition being that a vehicle speed is equal to or more than a prescribed vehicle speed threshold, a steering angular speed is equal to or more than a prescribed steering angular speed threshold, and an estimated lateral acceleration that is estimated to act on the vehicle is equal to or more than a prescribed first acceleration threshold;
• and
• reduce a winding amount of the webbing such that the winding amount of the webbing when the steering angular speed is equal to or more than the prescribed steering angular speed threshold due to steering being performed in one direction and then steering being performed in a reverse direction, is smaller than a winding amount of the webbing when the steering angular speed is equal to or more than the prescribed steering angular speed threshold due to steering being performed in one direction and then steering being performed in the same direction.