Measurement of effective thermal conductivity (λ e ) and effective thermal diffusivity (χ e ) of twin pellets of Se 90 In 10 bulk chalcogenide glass has been carried out in the temperature range from 303 to 323K and cooling from 323 to 303K using transient plane source (TPS) technique. In the heating process variation of effective thermal conductivity (λ e ) and effective thermal diffusivity (χ e ) is observed. Both quantities are found to be maximum at 313K, which lies in the vicinity of glass transition temperature (T g ). During the cooling process λ e and χ e remain same at all temperatures. Such type of behavior shows thermal hysteresis in this sample, which can be explained on the basis of structural change of the Se 90 In 10 bulk chalcogenide glass.