The high-pressure phase equilibria of carbon dioxide + benzaldehyde binary system were measured at temperatures from 298.55 to 345.15 K and pressures from 2.20 to 14.96 MPa. The experimental method used in this work was a static-analytical method with liquid and vapor phase sampling. The experimental results are discussed and compared with available literature data. The experimental data were correlated with the Peng-Robinson equation of state (PR EoS) using classical van der Waals (two-parameter conventional mixing rule) mixing rules, which could correlate well the binary phase behavior with an average absolute relative deviation of 3.4%. (c) 2012 Elsevier B.V. All rights reserved.