As a protective clothing for fire fighting which correspond to flames and a radiant heat is an air tight cloth, it is important to give off metabolic heat of the human body. Therefore, partial cooling of armpit and back, the bellows effect associated with neck opening and other attempts were made. The purpose of this study was to examine a few methods which improve heat stress of fireman with protective clothing for fire fighting. The subjects were four healthy males. The skin temperature was calculated on 7 points of Hady & DuBois method. The skin temperatures of neck, back thigh and the temperature within clothes and inside a helmet were also measured. The experiment was composed of the rest for 5 minutes, the 120W/m^2 exercise for 20 minutes and the rest for 5 minutes in the climatic chamber of temperature 30.0 ± 0.5 ℃, relative humidity of 50 ± 5%. As a result, the cooling effect by partial cooling of armpit and back with refrigerant and the neck opening were not admitted in this study. Furthermore, the partial cooling had the harmful effect on the body, which caused temperature rise of head and decrease of abdomen temperature.
