In the title compound, [PdCl(2)(C(26)H(24)P(2))]·C(2)H(6)OS, the Pd(II) atom adopts a distorted cis-PdCl(2)P(2) square-planar coordination geometry. The five-membered chelate ring adopts an envelope conformation with a methyl-ene C atom in the flap position. The S and C atoms of the dimethyl sulfoxide (DMSO) solvent mol-ecule are disordered over two sets of sites in a 0.8976 (18):0.1024 (18) ratio. The DMSO O atom accepts three C-H⋯O hydrogen bonds from an adjacent complex mol-ecule.