The evaluation for thermal protective performance of protective clothing against heat and flame was studied. In the case of protective clothing for workers, it has a good thermal stability with convective and radiant heat test. But the garments for firefighters were not the case. Although they had a good thermal stability to the convective heat test, they were not stable to the radiant heat test. This outcomes are a matter of grave concern. In spite that they failed in the radiant heat test, they still passed the standard by the current evaluation methods. Therefore it is necessary that the present evaluation methods of protective clothing should be complemented and revised.