The gas-phase hydrogenation of buta-1,3-diene to but-1-ene, trans- and cis-but-2-ene and butane has been performed over 0.5% Pd/gamma-Al2O3 catalyst. The reaction has been investigated at atmospheric pressure and 0 degrees C over a wide range of conversions. The kinetic model based on the present day knowledge of reaction mechanism has been advanced. The parameters of the kinetic model have been estimated through statistical data fitting. The kinetic model provides a fairly good description of selectivity in the whole range of conversions.