[en] By the method of pulse laser heating the molybdenum thermal diffusivity in the 300-1300 K temperature range is investigated. The non-excluded measurement error < 1.8%. In the same temperature range with 1% error the temperature dependence of electric resistance is determined. The comparison of the data obtained with molybdenum investigation results of the same melting by other methods is performed. The results obtained combined with the most reliable specific heat values are used for the Lorenz function calculation