Ten grams of PVC powder contained in a tray-type sample holder were pyrolyzed in the nitrogen atmosphere in order to investigate the HCl evolution and the hydrocarbon product generation. Most of HCl could be removed from PVC without starting degradation of hydrocarbon backbone in appropriate isothermal conditions, but at low temperatures HCl evolved to slowly. Removing HCl raised the gross calorific value near 10,000kcal/kg. But further degradation of HCl-removed residue yielded small amount of oil and even smaller amount of hydrocarbon gas. Not only was the hearvy oil fraction high in the recovered oil but the fixed carbon fraction including free carbons exceeded 10%.