Among the potential applications of coordination polymers, electrical con­ductivity ranks high in technological interest. We report the synthesis, crystal structure and spectroscopic analysis of an Ag^I–thiosaccharinate one-dimensional coordination polymer {systematic name: catena-poly[[[aquatetrakis(μ₃-1,1-dioxo-1,2-benzisothiazole-3-thiolato-κ³N:S³:S³)tetrasilver(I)]-μ₂-4,4′-(propane-1,3-diyl)dipyridine-κ²N:N′] dimethyl sulfoxide hemisolvate]}, {[Ag₄(C₇H₄NO₂S₂)₄(C₁₃H₁₄N₂)(H₂O)]·0.5C₂H₆OS}_n, with the 4,4′-(propane-1,3-diyl)dipyridine ligand acting as a spacer. A relevant feature of the structure is the presence of an unusually short Ag⋯Ag distance of 2.8306 (9) Å, well within the range of argentophilic interactions, confirmed experimentally as such by a Raman study on the low-frequency spectrum, and corroborated theoretically by an Atoms in Molecules (AIM) analysis of the calculated electron density. Electrical conductivity measurements show that this complex can act as a semiconductor with moderate conductivity.