The results of an experimental determination of the thermal conductivity and electrical resistivity of molybdenum at temperatures of 400--2200 and 300--2600 degreeK, respectively, are presented. Measurements of the thermal and electrical conductivity of molybdenum show that the ratio of the thermal conductivity to the electrical conductivity over the entire interval 400--2200 degreeK is given by lambda/sigma=2.69x10/sup -8/T+1.15x10/sup -6/ Wx..cap omega..xdeg/sup -1/. (AIP)