VEHICLE SEAT

A backrest of a vehicle seat, comprising a backrest frame, comprising a first lateral flank, a second lateral flank, an upper crossmember, a lower crossmember. The backrest further comprises a seat belt anchoring means support frame, comprising two upper tubes, each extending through a separate through-hole formed in the upper crossmember, so as to extend, at least partially, above the upper crossmember, a lower tube, positioned near the lower crossmember of the backrest frame, and fixed to at least one lateral flank of the backrest frame, at least one connecting tube connecting at least one upper tube to the lower tube.