The co-crystallization of the lead(II) complex [Pb(S ₂CNEt ₂) ₂] with tetraiodoethylene (C ₂I ₄) gave the co-crystal, [Pb(S ₂CNEt ₂) ₂]∙½C ₂I ₄, whose X-ray structure exhibits only a small change of the crystal parameters than those in the parent [Pb(S ₂CNEt ₂) ₂]. The supramolecular organization of the co-crystal is largely determined by an interplay between Pb⋯S tetrel bonding (TeB) and I⋯S halogen bonding (HaB) with comparable contributions from these non-covalent contacts; the TeBs observed in the parent complex, [Pb(S ₂CNEt ₂) ₂], remain unchanged in the co-crystal. An analysis of the theoretical calculation data, performed for the crystal and cluster models of [Pb(S ₂CNEt ₂) ₂]∙½C ₂I ₄, revealed the non-covalent nature of the Pb⋯S TeB (−5.41 and −7.78 kcal/mol) and I⋯S HaB (−7.26 and −11.37 kcal/mol) interactions and indicate that in the co-crystal these non-covalent forces are similar in energy.