Experimental phase equilibrium conditions data for carbon dioxide (CO 2 ) hydrate in porous medium with the presence of sodium chloride (NaCl) solution were investigated in this study. The experimental data were generated using graphic-method in presence of solutions contained (0, 0.2, 0.4, 0.6, and 0.8)mol/L NaCl. The results indicated the increase of NaCl concentration caused the enhancement in the equilibrium pressure of CO 2 hydrate as the pore size and the temperature were kept the same. Effects of NaCl solutions on CO 2 hydrate equilibrium conditions could be neglected when the temperature is lower than ice point. An improved model was used to predict CO 2 hydrate equilibrium conditions, and the predictions showed good agreement with experimental measurements.