Thermesthesia in clothes wearing is the important element which gives influence to a comfortable feeling by wearing clothes. Sensory test or physical properties of clothes has been used for evaluation of thermesthesia in clothes wearing. We propose a evaluation method of thermesthesia by using physiological response for the purpose of evaluating thermesthesia objectively. Electroencephalogram (EEG) is used as a physiological response for wearing. Using chaotic analysis, the complicacy of EEG is expressed quantitatively by the correlation dimension. We studied the relation between subjective thermesthesia and dynamics of EEG for the purpose of investigating effect of the evaluation of thermesthesia for wearing by using of chaotic analysis of EEG. As a result, under the comfortable condition with coat, EEG shows deterministic chaos. On the other hand, under the stress condition without coat, EEG shows weak chaos. Correlation dimension of EEG was higher with coat than without one. These results suggest that chaotic analysis of EEG is effective to the quantitative evaluation of thermesthesia.