We have tried to extend new effective temperature scale to evaluate thermal comfort in an air conditioned vehicle compartment which has uneven and unsteady environment. The equivalent temperature is calculated from measured thermal conditions and physiologic values. Physiologic values are calculated by a simple model of human thermal system, in which human body is divided into 16 components and each component consists of core and skin. The skin temperature calculated by the model and thermal vote expected from the equivalent temperature are in agreement with the experiment.