Atmospheric pressure microwave plasma (APMP) could be easily generated even in air by using carbon felt pieces impregnated with a metal salt such as alkali metal chlorides, alkali earth metal chlorides, and so on (CF/metal salt). As one of applications, the decomposition and complete removal of toluene, one of volatile organic compounds (VOCs) as environmental air pollutants, with APMP assisted by CF/NaCl and CF/CaCl2) was examined. Consequently, we succeeded in decomposing and removing it completely without carbon monoxide formation and CF consumption.