In the title 1:1 silver 4-aminobenzenesulfonate adduct with triphenylphosphine, [Ag(C6H6NO3S)(C18H15P)]n, the sulfonate –SO3 unit bridges, through only one O atom, two phosphine-coordinated Ag atoms, forming a centrosymmetric Ag2O2 rhombus. The Ag+ cation adopts a considerably distorted a tetrahedral coordination. In the crystal, adjacent binuclear molecules are connected into a layer motif through the amino group of the anion; the layers are perpendicular to the a axis.