The motor vehicle seat as well as a safety device for a motor vehicle seat

The invention relates to a safety device for a motor vehicle seat (1) having a pad (3) with an airbag (5) which is coupled to a gas generator (6) activated by the presence of sensor data about an accident or an imminent accident is filled and the air bag (5) with gas and deployed, and with an activator (8) through which a separate gas cushion (7) is additionally repeated reversibly filled with gas. The gas cushion (7) is connected via a coupling element (9) with the airbag (5). The coupling member (9) opens a ventilation opening (11) or forms such in the gas cushion (7) when the airbag (5) is deployed. The invention also relates to a motor vehicle seat (1) with such a safety device.