Studies of the hardness (Shore and Brinell), the mechanical strength (compression and transverse), the dynamic Young's Modulus, the thermal conductivity and the thermal expansion coefficient for coalcarbon compact as a function of heat treatment temperature (HTT) were carried out. Coal-carbon compact was made from Akabira weakly caking coal (d.a.f. C=83.4%) powder under pressure of 2000 kg/cm' at room temperature without binder. The values of Brine11 hardness, the mechanical strength, and the dynamic Young's modulus increase with increase of HTT, have a maximum at HTT 1200Β°C and then decrease with HTT, although the Shore hardness value shows two maxima over the temperature range 500 to 3150Β°C. The values of the mechanical strength of coal-carbon compact are very large in comparison with the ordinary pitch-bonded carbons. This depends upon the rigid binding among coal particles which occurred through the carbonization process. The thermal conductivity of coal-carbon increases with the increase of HTT. Good correlation between the thermal and the electric conductivity has been found. In Akabira coal-carbon, the thermal expansion coefficient decreases with increase of HTT, shows a minimum at about HTT 15OO"C, and increases with HTT.