Vehicle occupant restraint system

A vehicle occupant restraint system comprising:

• a pair of left and right lap belts that respectively have one ends supported by a vehicle seat or a vehicle body and that are coupled to each other via coupling portions provided at the other ends of the lap belts to restrain a hip of a seated occupant;
• a pair of left and right shoulder belts that correspond to the left and right lap belts respectively, that are coupled at respective lower end portions to portions of the corresponding lap belts, the portions being outside the corresponding coupling portions in a seat width direction, and that are used to restrain an upper body of the seated occupant;
• a pair of left and right retractors that correspond to the left and right shoulder belts respectively, that retract upper ends of the corresponding shoulder belts and that apply urging force to the corresponding shoulder belts in a direction to retract the shoulder belts;
• and
• a pair of left and right shape retainers that correspond to the left and right lap belts respectively, and that are provided at respective coupled portions at which the shoulder belts are coupled to the corresponding lap belts to retain the shape of the lap belts.