The kinetics and mechanism of processes of reduction of Pd(II) complexes with a number of inorganic (NH 3 , Cl -, etc.) and organic (ethylenediamine, glycine, α -alanine, etc.) ligands on a dropping-mercury electrode and a Pd electrode in solutions with various concentrations of ligands, hydrogen ions, and supporting electrolytes are reviewed. The nature of electrochemical and chemical steps of processes of reduction of various complexes of Pd(II) is discussed.