Abstract: In order to investigate the influences of tobacco's shape (lamina, cut tobacco, powder) on its thermophysical properties, the thermal conductivity, thermal diffusivity and mass heat capacity of bulk tobacco were measured by the transient plane thermal source method, and the influences of tobacco's shape on measurement repeatability, thermal conductivity, mass heat capacity, and the temperature sensitivity of the said properties were analyzed. The results showed that:1) The parameters of thermophysical properties in the descending order of measurement repeatability were thermal conductivity, thermal diffusivity, mass heat capacity. For an individual parameter, smaller tobacco particles presented higher measurement repeatability, in the order of tobacco powder > cut tobacco > tobacco lamina. 2) With the increase of bulk density, thermal conductivity increased gradually, while mass heat capacity reduced slightly. 3) Thermal conductivity reduced with the decrease of characteristic size of tobacco particles, and the thermal conductivity of lamina was more sensitive to temperature variation than that of cut tobacco.