The first structural analysis of a S-2(2-)-bridged Ru(II)Ru(III) compound is reported. The compound was isolated from an acetonitrile solution of [{RuCl(TMP)2}2(mu-Cl)2(mu-S2)] with the addition of NaPF6. The two Ru atoms are equivalent and are bridged by a S2(2-) ligand in trans positions.