Vehicle seat having an anti-submarining device and method

The invention relates to vehicle seat comprising a seat part and to a restraint device and a corresponding method of manufacture. The vehicle seat comprises an anti-submarining restraint device for preventing an occupant from slipping through on the vehicle seat when decelerated due to a crash, said restraint device being settable to an extended inactive position and said restraint device being settable to an extended active position. The seat part, in the longitudinal direction of the vehicle, has a padding defining a seat area, and a padding support below said padding. The restraint device is arranged between the padding support and the padding and spaced apart from the lateral parts by means of a locking element (e.g. detent recesses or the like) provided for locking the restraint device in the active position.