A passenger protecting device 10 for a vehicle has: a side airbag portion 20 that is accommodated at an interior of a side support portion 14B, and that, by receiving a supply of gas and inflating at a time of an oblique side collision of a vehicle, causes the side support portion 14B to bulge-out toward the seat upper side; and a seat cushion airbag portion 22 that is accommodated at an interior of the seat portion 14A, and that, by receiving a supply of gas and inflating at a time of an oblique side collision of the vehicle, causes the seat portion 14A to bulge-out toward the seat upper side and raises the femoral region D of the passenger P, and whose inflation is completed later than the side airbag portion 20.