A vehicle occupant restraint system including: a seatbelt device including a shoulder belt portion restraining a part of a vehicle occupant from one of shoulders to a chest, and a lap belt portion restraining a waist of the vehicle occupant; an upper airbag provided in the shoulder belt portion, and configured to be deployed forward from the shoulder belt portion; a lower airbag provided in the lap belt portion, and configured to be deployed forward from the lap belt portion, the deployed upper and lower airbags coming into contact with each other in a vertical direction; and a movement restraining portion restraining relative movement of the deployed upper and lower airbags in a front-rear direction, extending downward from a lower side of the deployed upper airbag, and positioned in the rear of the deployed lower airbag.