In order to clarify the thermal characteristics of silk woven fabrics, the warm/cool feeling and heat-keeping properties of several fabrics were investigated. The measurement was carried out by the steady state method and under the standard measuring condition using the Thermo Labo II type(KES-F7) system. The samples used for this study are composed of 40 kinds of silk woven fabrics. The measured thermal properties of silk woven fabrics were statistically analysed to relate them with the structural and mechanical properties.