Thermoanalytical study of metallic diethanoldithiocarbamate complexes of the type M[S2CN9C2H4OH)(2)](n), where M=Cd2+, Cr3+, Mn2+' and Bi3+. The thermogravimetry (TG), derivative thrrmogravimetry (DTG) and differential scanning calorimetry (DSC) techniques were used. The final decomposition products found were metallic sulfides and oxides in nitrogen and air atmosphere, respectively, except for chromium complexes giving up Cr2O3 as residue in nitrogen atmosphere. This experimental evidence can be explained by means of a hydroxy complex also formed during the compound synthesis. This was confirmed by means of atomic absorption and TG experiments. The thermoanalytical results give rise to an inference about thermal stability and possible thermal decomposition mechanisms under nitrogen and air dynamic atmospheres.