Abstract: Pure and (AlCl3.6H2O) salt filled (with different weight ratios (1, 3, 5, 7, 9, 11, 13 and 15) wt.%) Polyvinyl Alcohol (PVA) films have been prepared using casting method. The influence of (AlCl3.6H2O) salt on some thermal properties of PVA films was studied by Differential Scanning Calorimetry (DSC). The interaction between (PVA) and (AlCl3.6H2O) salt was investigated by Fourier Transform Infrared (FTIR) 3 2 spectroscopy. The results of TGA curves showed that pure (PVA) film underwent two stages of thermal decomposition process and total weight loss was (100%) whereas the (AlCl3.6H2O) salt filled (PVA) films showed two and three stages of thermal decomposition process with lower total weight loss compared with pure (PVA) film. Moreover, the results of (FTIR) indicated that (AlCl3.6H2O) salt could form interaction with the hydroxyl group on PVA chain.