Isothermal and isobaric vapor-liquid equilibria (VLE) were measured for the binary mixture a-pinene + octane at the temperatures (348.15, 363.15, and 383.15) K and at the pressures (26.66 and 53.33) kPa with an inclined ebulliometer. The experimental results are analyzed using the UNIQUAC equation with temperature-dependent binary parameters with satisfactory results.