In this work, phase equilibrium data for ethane hydrate in the presence of MgCl2 aqueous solutions were reported at concentrations of (0.05, 0.3, 0.5, 0.8, and 1.2) mol.dm(-3) MgCl2 in the temperature and pressure ranges of (276.2 to 286.0) K and (1.12 to 2.70) MPa, respectively. Measurements were made using the isochoric pressure-search method. The results showed that the addition of MgCl2 caused the phase equilibrium temperatures to be lowered. The difference of phase equilibrium temperatures between pure water and a solution at a given pressure increased with the increasing concentration of MgCl2.