The investigations of coordination compounds of palladium(II) with biologically active ligands are due to the possibility to use them as potential medicobiologic substances. Complex compounds of palladium(II) with aminoacids, including mixed-ligand ones, are an object of particular interest. The synthesis of a novel mixed-ligand complex of palladium(II) with glycine and aspartic acid was carried out in an aqueous medium at pH 3-4 by mixing the starting substances in an equimolar ratio until the formation of a light-yellow precipitate. The composition and structure of the compound obtained were investigated by chemical, differential thermal, X-ray phase analyses and IR, NMR, electronic absorption spectroscopies. On the basis of the results of the above methods, we propose bidentate coordination of ligands by donor nitrogen and oxygen atoms, which form the coordination unit of the complex, [Pd2Namine20carbox], of distorted square cisstructure, the second coordination sphere of the complex being supplemented by two water molecules: cis-[PdGlyHAsp] · 2H2O (formula). The electrochemical investigations were carried out at room temperature in an electrolyte of the composition (molL -1 ): [Pd(Gly)(HAsp)], 510-3 ; NaClO4, 1 at pH 3.17 and 7.00. The cyclic voltammograms were recorded on a platinum rotating disk electrode (Ø 1 mm) at scan rates of 50 – 500 mVs -1 . The cathodic curve exhibits a peak at -260 mV (at pH 3.17) and at -700 mV (at pH 7.00). As the scan rate is increased, the cathodic peak shifts towards negative potentials and reaches ≈ 30 mV on its tenfold increase. This indicates the total number of electrons involved in the cathodic process to be 2. The electroreduction of the palladium(II) glycinate-aspartate complex takes place by the deposition of metallic palladium on the cathode with ligand anion transfer into the bulk electrolyte. The process is controlled by diffusion, and the mean diffusion coefficients of the complexes being reduced turn out to be 0.8510-5 and 2.7510-5 cm2  s -1 for acidic pH 3.17 and neutral pH 7.00 respectively. The differences in diffusion coefficient values indicate that depending on acidity, the electrochemically active species is either the uncharged complex [Pd(Gly)(HAsp)]0 or its positively charged protonated form [Pd(HGly)(H2Asp)]2+. The apparent electron transfer coefficients 0.14 at acidic pH and 0.12 at neutral pH indicate the cathodic process to be irreversible.