For magnesium diboride (MgB2), some of the superconducting properties that have beenrnstudied are summarized. The energy dispersion relation is determined and it is used torndetermine the electronic thermal conductivity of MgB2. From that energy function, thernexpression for the electronic heat capacity of magnesium diboride in normal state hasrnbeen determined. The general expression of the electronic thermal conductivity for MgB2rnin normal state is found. Then, by taking the energy gap parameter in to account thernelectronic thermal conductivity has been computed for the superconducting state of ourrnmaterial; that is below the transition temperature. Then, the electronic thermalrnconductivity of magnesium diboride has been plotted as a function of temperature with inrnthe superconducting state. Moreover, the electrical conductivity of MgB2 is calculatedrnand the Wiedemann-Franz law is checked for normal state of a material. Finally, therngeneral expression for electronic thermal conductivity of MgB2 is determined in K -rnSpacernKey Words: Magnesium diboride, thermal conductivity, superconducting state