Abstract: In the seat cover used to cover a vehicle's seat (1) it is putted, in the part which in the application will result positioned on uppon line (SU) of relative back (S), almost a crop of metal strap made of manually capable of being deformed material in order to make an only one element (11 or 22) developing longitudinally along this line near its uppon bord (SU) or along adjoining uppon end of back (S), or a couple of transversal elements made of flasks (44) placed symmetrically out of danger of this line (SU) moreover towards their side ends and which can rusult indipendent or interconnect by a longitudinal line (331) like single lines (11 or 22). Line or lines of metal strap in this way putted down, make relative fixing elements single multiple (11 or 22) multiple (44) or composite (331 or 332) which manually modelled by user, permit him regulary and uniformly to stick the covering seat cover at the relative seat (1).