In a vehicle occupant protection device (20) comprising an airbag (22), especially for a passenger, including a fastening portion (24) as well as an inflatable restraining portion (26) being especially adjacent to the fastening portion (24), it is provided that the fastening portion (24) is arranged beside the sitting position of the vehicle occupant (12) and the restraining portion (26) is configured so that in the fully inflated unloaded state the airbag (22) extends in front of the vehicle occupant (12). There is further provided a vehicle seat (10) comprising a vehicle occupant protection device (20) of this type, wherein the fastening portion (24) and/or the inflator (28) are arranged on the side of or within the vehicle seat (10), especially on or within the seat cushion (14).