The densities of alpha-tocopherol in supercritical carbon dioxide were measured from (308.15 to 333.15) K and within the pressure range (10 to 40) MPa using a vibrating tube densimeter. The reliability of this technique has been verified in our previous work. The dependence of densities of alpha-tocopherol in supercritical carbon dioxide on composition, temperature, and pressure is presented in this study. Experimental data were correlated by the Peng-Robinson equation of state with the Panagiotopoulos-Reid mixing rule.