An assembly of a vehicle seat is provided. The assembly comprises a component which comprises an opening which is delimited by an opening edge and a fastening device which is to be secured on the component and comprises a clamping part and a screw part which is to be connected in a screwing manner to the clamping part. The clamping part comprises at least one clamping portion, is insertable into the opening in a direction of insertion and is connectable to the component in a clamping manner as a result of screw-connecting the screw part to the clamping part.