The cathodic reaction of the reduction of Dy(III) ions on inert molybdenum and active gallium electrodes in molten NaCl–2CsCl eutectic at the temperature range of 843–973 K in inert gas atmosphere by stationary and non-stationary electrochemical methods was studied. Anhydrous dysprosium trichloride from “Aldrich” company was used in experiments. Sodium and cesium chlorides were purified from oxygen-containing impurities by the method of directed crystallization before use. In addition, a zirconium getter was placed in the experimental cell to absorb traces of oxygen adsorbed on the inner walls of the quartz tube. One cathode current peak corresponding to the reduction of Dy(III) ions to metal and one anode peak associated with its dissolution are recorded on the cyclic voltammograms of NaCl–2CsCl–DyCl3 molten salt solution in the studied “electrochemical window”. According to the theory of linear sweep voltammetry, the process of the cathodic reduction of Dy(III) ions to the metal at the inert electrode proceeds in one stage, is irreversibly and controlled by the charge transfer rate. The diffusion coefficient of [DyCl6]3– ions in molten NaCl–2CsCl eutectic obeys the Arrhenius’s law through the following equation: lgD=−2.81−1920T±0.02. The electrode potential of Dy(III)/Dy couple was determined at several temperatures by open-circuit potentiometry. Experimental values are described by the linear equation: E_{{{{{\text{Dy}}\left( {{\text{III}}} \right)} \mathord{\left/ {\vphantom {{{\text{Dy}}\left( {{\text{III}}} \right)} {{\text{Dy}}}}} \right. \kern-\delimiterspace} {{\text{Dy}}}}}}^{{\text{*}}} = - \left( {3.827 \pm 0.005} \right) + \left( {6.6 \pm 0.1} \right) \cdot {{10}^{{ - 4}}} \cdot T \pm 0.003\,\,~{\text{V}}. The apparent standard Gibbs energy change, enthalpy, and entropy of the reaction of the formation of dysprosium trichloride from the elements were determined. On the cyclic voltammogram of the NaCl–2CsCl–DyCl3 molten solution, obtained on the active gallium electrode, the process of alloy formation was observed. This process proceeds of formation of metallic dysprosium at the cathode. The electrode potential of Dy-Ga alloy was determined at several temperatures by open-circuit potentiometry. Experimental values are described by the linear equation: E_{{{{{\text{Dy}}\left( {{\text{III}}} \right)} \mathord{\left/ {\vphantom {{{\text{Dy}}\left( {{\text{III}}} \right)} {{\text{Dy}}}}} \right. \kern-\delimiterspace} {{\text{Dy}}}}}}^{{\text{*}}} = - \left( {3.092 \pm 0.006} \right) + \left( {3.6 \pm 0.2} \right) \cdot {{10}^{{ - 4}}} \cdot T \pm 0.005\,\,~{\text{V}}. The activity coefficients of solid Dy in liquid Ga as a function of the temperature were calculated.