In recent years, more attention is paid to green chemistry and to using of solvents that don’t affect environment. An example is deep eutectic solvents that are non-toxic, biodegradable, biocompatible, have a low price and can be easy prepared by simple mixing two components. DESs have a much lower melting point than either of the individual components. Due to their properties DESs are used in different fields: electrochemistry, polymer synthesis, nanomaterials, separation of by-products from biodiesel [1]. They are used in organic synthesis, where act not only as solvents for reactants, but also as catalysts. Search for the most suitable DES as catalysts is the aim of our study. No published data exist on application of imidazolium salts as organic salt for DESs preparation. Therefore our research has been directed to the synthesis of imidazole-based DESs. The synthesis of imidazole derivate involved mixing equimolar quantities of N-vinylimidazole and monochloroacetic acid [2]. Urea and thiourea have been used as hydrogen bond donors (HBD). The components have been mixted in different ratio and then their melting points were determined. It was concluded that all the resulting mixtures are deep eutectic solvents. The research data are presented in the table. Organic salt Melting point/°C HBD Melting point/°C Salt: HBD (molar ratio) Melting point of DES/°C 189 Urea 132 5:1 162-185 Urea 132 1:2 73-120 Urea 132 1:1 121-135 Urea 132 2:1 112-149 Thiourea 182 1:1 105-128 Thiourea 182 2:1 155-167