Voltammetric and chronopotentiometric studies have shown that the reduction of InCl3 dissolved in molten LiCl-KCl at 450 degrees C follows a two step mechanism : In3++2e(-)double left right arrow In+ and In(+)1e(-)double left right arrow In-0. The In3+/In+ and In+/In-0 couples were studied separately by electrochemical impedance spectroscopy (EIS). Analysis of the spectra showed that the electronic exchanges are respectively reversible and quasi-reversible. Moreover, it allowed the determination of the rate constant of In+/In-0 exchange, the diffusion coefficients of indium species in the LiCl-KCl eutectic, and also the diffusion layer thickness.