The title complex, [PtCl2(C6H7NO)(C2H6OS)], exhibits square-planar geometry. The plane of the pyridine ring makes a dihedral angle of 67.2 (3)degrees with the square plane of the metal center. The S-O bond is nearly aligned with the adjacent Pt-N bond, leaving the methyl groups of the dimethyl sulfoxide ligand to stagger the Pt-Cl bond.