[Problem] To provide a passenger restraint apparatus capable of suppressing the movement of an airbag away from a passenger without requiring a complex structure. [Resolution Means] A passenger restraint apparatus according to the present invention is configured to include a seat of a vehicle and restrain a passenger seated in this seat, wherein this passenger restraint apparatus includes: an airbag which is stored in a seat back part of the seat, and expanded and deployed to the side of the passenger seated in this seat; and a tension fabric which passes through the side opposite the passenger of the stored airbag so as to be stored from the seat back part of the seat to the seat cushion part, wherein, when the airbag is expanded and deployed, at least a portion of the tension fabric is configured so as to be deployed to the outside of this seat by the cleaving of the skin of the seat, in addition to being stretched from the position in the vicinity of the shoulder of the passenger in the seat back to the position on the front side of the vehicle on the side of the seat cushion, and wherein this tension fabric includes a part for holding the surface of the airbag opposite the passenger.