Isothermal vapor-liquid equilibrium data have been measured for the system hydrogen (1) + dimethyl ether (2) at three temperatures, 15.00, 33.00, and 43.00 degrees C. Two cubic equations of state have been used to correlate the results, the Soave-Redlich-Kwong (SRK) and the Peng-Robinson (PR) equations. Far the SRK equation, the MHV2 mixing rule was used in combination with the modified UNIFAC model, and for the PR equation, the MHV2 mixing rule was used in combination with the original UNIQUAC model.