Abstract: Styryl dyestuffs of the formula ##STR1## wherein Q.sym. represents a grouping containing a quaternary nitrogen atom and A represents a bridge member,at least one of the radicals R and R.sub.1 denotes a carbocyclic or heterocyclic 5-membered or 6-membered ring optionally bonded via a linking member to the nitrogen atom, or, with the o-position of ring a, forms a heterocyclic structure of this type, and the second radical can also represent alkyl or alkenyl, orR and R.sub.1 together form a 5-membered or 6-membered ring, andA.crclbar. represents an anion,are suitable for dyeing, enscribing and printing paper and for dyeing and printing synthetic fibres, especially made of polyacrylonitrile, acid-modified polyesters or polyamides.