In the present work, the solubilities of NH3 in deep eutectic solvents formulated by ethylamine chloride (EaCl) and urea were determined at (313.2-353.2) K and (0-300.0) kPa. It is found that the isotherms for NH3 absorption display slightly nonideal profiles, and EaCl contributes slightly more than urea to the absorption of NH3 in EaCl + urea mixtures. Overall, EaCl + urea mixtures possess quite promising absorption capacities for NH3, with the values of (4.179-4.573) mol.kg(-1) at 313.2 K and similar to 100.0 kPa. The Krichevsky-Kasarnovsky (K-K) equation was used for the correlation of NH3 solubilities, and Henry's constants and infinite-dilution partial molar volumes of NH3 in EaCl + urea mixtures were obtained. The thermodynamic functions of the NH3 absorption process were also calculated based on the relationship between Henry's constants and temperatures. Considering that the physical properties are basic data for liquid solvents, the densities, viscosities, glass transition temperatures, melting temperatures, and freezing temperatures of EaCl + urea mixtures at different temperatures were also determined.